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Boundary condition for generalized functions
In mathematical analysis, the trace operator extends the notion of the restriction of a function to the boundary of its domain to "generalized" functions
Trace_operator
Sum of elements on the main diagonal
size. Thus, similar matrices have the same trace. As a consequence, one can define the trace of a linear operator mapping a finite-dimensional vector space
Trace_(linear_algebra)
Compact operator for which a finite trace can be defined
specifically functional analysis, a trace-class operator is a linear operator for which a trace may be defined, such that the trace is a finite number independent
Trace_class
Function over linear operators
partial trace is a generalization of the trace. Whereas the trace is a scalar-valued function on operators, the partial trace is an operator-valued function
Partial_trace
Concept in Hlibert spaces mathematics
matrices and linear operators on Hilbert spaces. This article covers some important operator inequalities connected with traces of matrices. Let H n
Trace_inequality
Mathematical concept
In mathematics, a weak trace class operator is a compact operator on a separable Hilbert space H with singular values the same order as the harmonic sequence
Weak_trace-class_operator
Topics referred to by the same term
Look up Trace, trace, traces, or tracing in Wiktionary, the free dictionary. Trace may refer to: Trace (Son Volt album), 1995 Trace (Died Pretty album)
Trace
Extension of Lidskii's theorem
Grothendieck trace theorem is an extension of Lidskii's theorem about the trace and the determinant of a certain class of nuclear operators on Banach spaces
Grothendieck_trace_theorem
Mathematical theorem
Arthur–Selberg trace formula. When Γ is the fundamental group of a Riemann surface, the Selberg trace formula describes the spectrum of differential operators such
Selberg_trace_formula
Topic in mathematics
it may be written as an integral operator of this form. The product of two Hilbert–Schmidt operators has finite trace-class norm; therefore, if A and B
Hilbert–Schmidt_operator
Quantum algorithm in computer science
Jones polynomial. This is done by means of the Markov trace. The "Markov trace" is a trace operator defined on the Temperley–Lieb algebra T L n ( d ) {\displaystyle
Aharonov–Jones–Landau algorithm
Aharonov–Jones–Landau_algorithm
Property of a thermodynamic system
{\rho }}} is a density matrix, t r {\displaystyle \mathrm {tr} } is a trace operator and ln {\displaystyle \ln } is a matrix logarithm. The density matrix
Entropy
dimension. In Hilbert spaces such operators are usually called trace class operators and one can define such things as the trace. In Banach spaces this is no
Nuclear operators between Banach spaces
Nuclear_operators_between_Banach_spaces
Norm on a vector space of matrices
which is the operator norm induced by the vector 2-norm (see above). Finally, p = 1 yields the nuclear norm (also known as the trace norm, or the Ky
Matrix_norm
Vector in statistics
(\varepsilon ^{T}\Lambda \varepsilon )} . Next, by the cyclic property of the trace operator, E [ tr ( ε T Λ ε ) ] = E [ tr ( Λ ε ε T ) ] . {\displaystyle
Quadratic_form_(statistics)
Generalized measurement in quantum mechanics
(\rho F_{i})} , where tr {\displaystyle \operatorname {tr} } is the trace operator. When the quantum state being measured is a pure state | ψ ⟩ {\displaystyle
POVM
Class of transformations that quantum systems and processes can undergo
operator is a non-negative operator on a Hilbert space with unit trace. Mathematically, a quantum operation is a linear map Φ between spaces of trace
Quantum_operation
Noncommutative geometric structure
singular trace is a trace on a space of linear operators of a separable Hilbert space that vanishes on operators of finite rank. Singular traces are a feature
Singular_trace
Type of continuous linear operator
mathematics, a compact operator is a linear operator that behaves, in several important respects, like a finite-dimensional operator such as a matrix. In
Compact_operator
Linear operator in mathematics
mathematics, the composition operator C ϕ {\displaystyle C_{\phi }} with symbol ϕ {\displaystyle \phi } is a linear operator defined by the rule C ϕ ( f
Composition_operator
p}(\partial M,N)} and that when N = R {\displaystyle N=\mathbb {R} } , the trace operator is onto. The proof of the surjectivity being based on an averaging argument
Sobolev_mapping
Calculation rule in quantum mechanics
(\rho F_{i}),} where tr {\displaystyle \operatorname {tr} } is the trace operator. This is the POVM version of the Born rule. When the quantum state being
Born_rule
Operator generalizing the Laplacian in differential geometry
In differential geometry, the Laplace–Beltrami operator is a generalization of the Laplace operator to functions defined on submanifolds in Euclidean space
Laplace–Beltrami_operator
Algebraic trace
trace, introduced by Jacques Dixmier (1966), is a non-normal trace on a space of linear operators on a Hilbert space larger than the space of trace class
Dixmier_trace
Vector space of functions in mathematics
theorem resolves the problem: Trace theorem—Assume Ω is bounded with Lipschitz boundary. Then there exists a bounded linear operator T : W 1 , p ( Ω ) → L p
Sobolev_space
Number of vectors in any basis of the vector space
of a vector space may alternatively be characterized as the trace of the identity operator. For instance, tr id R 2 = tr ( 1 0 0 1 ) = 1 + 1 = 2
Dimension_(vector_space)
}}\gamma ({\vec {u}})=0\}} , where γ {\displaystyle \gamma } is the trace operator. Furthermore, A − 1 : H → V {\displaystyle A^{-1}:H\rightarrow V} is
Stokes_operator
Complex-valued function
operator. It is defined for bounded operators on a Hilbert space which differ from the identity operator by a trace-class operator (i.e. an operator whose
Fredholm_determinant
In mathematics, invariant of square matrices
for particular kinds of operators. The Fredholm determinant defines the determinant for operators known as trace class operators by an appropriate generalization
Determinant
Statistical term
{I} _{p})=p} , where Tr {\displaystyle \operatorname {Tr} } is the trace operator. Large leverage h i i {\displaystyle {h_{ii}}} corresponds to an x i
Leverage_(statistics)
In mathematics, a linear operator acting on inner product space
positive trace-class operators ρ {\displaystyle \rho } on H C {\displaystyle H_{\mathbb {C} }} for which Trace ρ = 1. {\displaystyle \mathop {\text{Trace}}
Positive_operator
Capability to trace something
force in 2002, making traceability compulsory for food and feed operators and requiring those businesses to implement traceability systems. The EU introduced
Traceability
Identity in Itô calculus analogous to the chain rule
f w.r.t. X, HX f is the Hessian matrix of f w.r.t. X, and Tr is the trace operator. We may also define functions on discontinuous stochastic processes
Itô's_lemma
Mathematical conjecture about the Riemann zeta function
of number theory as a trace formula on noncommutative geometry of Adele classes. A possible connection of Hilbert–Pólya operator with quantum mechanics
Hilbert–Pólya_conjecture
Mathematical tool in quantum physics
a positive semi-definite operator, see below. A density operator is a positive semi-definite, self-adjoint operator of trace one acting on the Hilbert
Density_matrix
Differential operator in mathematics
In mathematics, the Laplace operator or Laplacian is a differential operator given by the divergence of the gradient of a scalar function on Euclidean
Laplace_operator
Construct in quantum information theory
generated by the Hermitian trace-class operators, with the trace norm. A mixed state ρ is separable if it can be approximated, in the trace norm, by states of
Entanglement_witness
*-algebra of bounded operators on a Hilbert space
bounded operators on a Hilbert space H is the Banach space of all trace class operators with the trace norm ||A||= Tr(|A|). The Banach space of trace class
Von_Neumann_algebra
different versions of the trace formula. The first version was the unrefined trace formula, whose terms depend on truncation operators and have the disadvantage
Arthur–Selberg_trace_formula
Vector differential operator
Del, or nabla, is an operator used in mathematics (particularly in vector calculus) as a vector differential operator, usually represented by ∇ (the nabla
Del
Country in Southeast Asia
destinations to visit. Much of Vietnam's modern transportation network can trace its roots to the French colonial era, when it was used to facilitate the
Vietnam
Hilbert space of Hilbert–Schmidt operators. Moreover, the 1st Schatten class is the space of trace class operators. (Conway 2000, p. 93) Schatten, Robert
Schatten_class_operator
1990–1991 conflict in the Middle East
confidence that sarin is a causative agent of GWI. Elizabeth Neuffer Iraqis Trace Surge in Cancer to US Bombings Archived 2 September 2013 at the Wayback
Gulf_War
Search engine from Google
Search Monopoly". Tech Policy Press. Retrieved April 24, 2025. Dominguez, Trace (September 2, 2015). "How Much of the Internet Is Hidden?". Seeker. Group
Google_Search
Country in Southeast Europe
since at least the Upper Palaeolithic, with permanent human settlement traced to the Neolithic cultures of Butmir, Kakanj, and Vučedol. After the arrival
Bosnia_and_Herzegovina
Country in northern Europe
reforms. In 1854, women won the right to inherit property. In 1863, the last trace of keeping unmarried women in the status of minors was removed. Furthermore
Norway
Fourier transform of the probability density function
} where tr ( ⋅ ) {\textstyle \operatorname {tr} (\cdot )} is the trace operator, If X is a complex random variable, then for t ∈ C φ X ( t ) = E [
Characteristic function (probability theory)
Characteristic_function_(probability_theory)
European wide-body airliner
service with 12 operators as of May 2025[update], with Emirates being by far the largest operator with 116 A380s in its fleet. Other top operators are British
Airbus_A380
Country in Central America
monolithic sculptures at the Barriles (Chiriqui) site are also important traces of these ancient isthmian cultures. Before Europeans arrived, Panama was
Panama
Banach space of a dual
For example, the predual of the space of bounded operators is the space of trace class operators, and the predual of the space L∞(R) of essentially
Predual
Legislative capital of South Africa
equipped with infrared cameras, and can detect body heat in cold water, trace residual heat from discharged firearms, and capture the thermal signatures
Cape_Town
Symbol representing the word "and" (&)
based on a crossed epsilon, as might be handwritten The ampersand can be traced back to the 1st century CE and the old Roman cursive, in which the letters
Ampersand
Free and open-source anonymity network based on onion routing
technique is called onion routing. Using Tor makes it more difficult to trace a user's internet activity by preventing any single point on the internet
Tor_(network)
Political ideology promoting free-market capitalism
occurred during the 1970s energy crisis; he and sociologist Thomas Volscho trace the origin of its political rise to Lewis Powell's 1971 confidential memorandum
Neoliberalism
City in Florida, United States
parent company of Olive Garden and LongHorn Steakhouse, and the largest operator of casual dining restaurants in the world by revenue. In September 2009
Orlando,_Florida
Island in the Mediterranean, region of Italy
pistachios, and fresh vegetables. Arab influences on Sicilian cuisine trace to the Arab domination of Sicily in the 10th and early 11th centuries, and
Sicily
Interaction of a quantum system with a classical observer
vectors comprising the basis. A density operator is a positive-semidefinite operator on the Hilbert space whose trace is equal to 1. For each measurement
Measurement in quantum mechanics
Measurement_in_quantum_mechanics
Matrix defined using smaller matrices called blocks
\left(A^{\mathcal {B}}\right)_{ij}=B_{ji}} . As with the conventional trace operator, the block transpose is a linear mapping such that ( A + C ) B = A B
Block_matrix
British statesman and admiral (1900–1979)
in the face of setback or disaster rendered him the most formidable of operators. He was infinitely resourceful, quick in his reactions, always ready to
Lord_Mountbatten
1999 film by the Wachowskis
Matrix, starring in their 1996 film Bound. Marcus Chong as Tank: The "operator" of the Nebuchadnezzar and Dozer's brother; they are both "natural" (as
The_Matrix
American actress
Television film 2009 The Unit Madam Episode: "Unknown Soldier" 2009 Without a Trace Margot Episode: "True" 2009 The Ex List Arlene Dubinski Episode: "Momma's
Deborah_Van_Valkenburgh
British spy thriller TV series (2022–present)
(PDF). British Society of Cinematographers. Retrieved 14 June 2025. "The Operators Award" (PDF). British Society of Cinematographers. Retrieved 14 June 2025
Slow_Horses
Linear operator in functional analysis
{\displaystyle T} is then a compact operator, and one has the canonical form for compact operators. Compact operators are trace class only if the series ∑ i
Finite-rank_operator
Generators of the Clifford algebra for relativistic quantum mechanics
Proving the above involves the use of three main properties of the trace operator: tr ( A + B ) = tr ( A ) + tr ( B ) {\displaystyle \operatorname
Gamma_matrices
Mathematical entity to describe the probability of each possible measurement on a system
a_{i}} are eigenkets and eigenvalues, respectively, for the operator A, and "tr" denotes trace. Two types of averaging are occurring, one (over i {\displaystyle
Quantum_state
factor with the canonical normalized trace τ {\displaystyle \tau } and let X {\displaystyle X} be an invertible operator in M {\displaystyle {\mathcal {M}}}
Fuglede−Kadison_determinant
NASA/ESA space telescope launched in 1990
Earth orbit by a rocket. The history of the Hubble Space Telescope can be traced to 1946, to astronomer Lyman Spitzer's paper "Astronomical advantages of
Hubble_Space_Telescope
U.S. territory in the Caribbean
born in the 50 U.S. states, the District of Columbia or elsewhere, but trace their family ancestry to Puerto Rico. "Catholic Church and Puerto Rico officials
Puerto_Rico
Bounded linear operator
… {\displaystyle k=0,1,2,\dots } . The operator norm of V is 2 / π {\displaystyle 2/\pi } . V is not trace class. V has no eigenvalues and therefore
Volterra_operator
1959 American plane crash
in his flight plan, Dwyer became concerned. At his request, the radio operator tried to contact Peterson, to no response. The Bonanza had impacted the
The_Day_the_Music_Died
City in Illinois, United States
Egyptian gods Thoth and Anubis having taken on the guise of funeral home operators in the town. Cairo had its own minor-league baseball team (variously known
Cairo,_Illinois
Identifies the commutant of a specific von Neumann algebra
=1\otimes \delta _{1}} is a cyclic-separating trace vector. Moreover the modular conjugation operator J and commutant M ' can be explicitly identified
Commutation theorem for traces
Commutation_theorem_for_traces
1921 mass violence in Oklahoma, US
shoeshiner, was accused of assaulting Sarah Page, a white 21-year-old elevator operator in the nearby Drexel Building. He was arrested and rumors spread that he
Tulsa_race_massacre
operators on a Hilbert space H. B(H) admits a predual B*(H), the trace class operators on H. The ultraweak topology is the weak-* topology so induced;
Ultraweak_topology
The zeta function of a mathematical operator O {\displaystyle {\mathcal {O}}} is a function defined as ζ O ( s ) = tr O − s {\displaystyle \zeta _{\mathcal
Zeta_function_(operator)
English actor and singer (1922–2015)
Lee joined Beecham's, at first as an office clerk, then as a switchboard operator. When Beecham's moved out of London, he joined the Home Guard. In the winter
Christopher_Lee
American outlaw biker (1938–2022)
bikers seeking to steal their patches. Barger was employed as a machine operator from 1960 to 1965, when he was dismissed due to extended absences. His
Sonny_Barger
Iranian unmanned aerial combat vehicles
Retrieved 28 November 2025. Anwer, Ammar (8 November 2025). "Malawi moves to trace girls forced into Russian drone production". TVP World. Archived from the
Shahed_drones
French footballer (born 1987)
with the Korean automobile manufacturer Hyundai, the French telephone operator SFR and its subsidiary BuzzMobile, the French bank LCL and the sports betting
Karim_Benzema
Weak topology on function spaces
trace class operators C1(H), and it generates the w*-topology on B(H), called the weak-star operator topology or σ-weak topology. The weak-operator and
Weak_operator_topology
was appointed for Trace, and he sued Mr. Cogan and the other former directors of Trace. His theory was that Mr. Cogan had treated Trace as a personal holding
Marshall_Cogan
President of the Philippines since 2022
of its territory". In 2024, Marcos banned Philippine offshore gaming operators that had proliferated under the previous administration, while Vice President
Bongbong_Marcos
normal trace τ and the standard Gelfand–Naimark–Segal action of M on H = L2(M, τ), Edward Nelson proved that the measurable affiliated operators do form
Affiliated_operator
State in western India
during their koli dance performances. Modern Theatre in Maharashtra can trace its origins to the British colonial era in the middle of the 19th century
Maharashtra
Armored personnel carrier
variant. K216: NBC reconnaissance vehicle. Equipped with detection system to trace sources of NBC agents. K221: Smoke generating vehicle. Produces two types
K200_KIFV
Non-commercial use of the radio spectrum
least every ten minutes and at the end of the conversation. Amateur radio operators must hold an amateur radio licence, granted after an examination that
Amateur_radio
Special forces unit of the British Army
operational control of the Director Special Forces. The Special Air Service traces its origins to 1941 during the Second World War. It was reformed as part
Special_Air_Service
Hungarian and American mathematician and physicist (1903–1957)
elucidation of spectral theory for normal operators, the first abstract presentation of the trace of a positive operator, a generalisation of Riesz's presentation
John_von_Neumann
Method for constructing existence proofs and calculating solutions in variational calculus
\mathbb {R} ^{m})} of functions whose trace is some fixed function g {\displaystyle g} in the image of the trace operator. This restriction allows finding
Direct method in the calculus of variations
Direct_method_in_the_calculus_of_variations
New York-based organized crime group
established a trade association of lunch wagon operators and taken control of the industry. Any operator who refused to join the Association and pay its
Bonanno_crime_family
where Tr ( ⋅ ) {\displaystyle \operatorname {Tr} (\cdot )} is the trace operator and G = { ( Δ , x ) : f i ( Δ , x ) ≤ 0 , 0 ≤ i ≤ k , Δ = x x T } {\displaystyle
Chebyshev_center
Ukrainian 155 mm self-propelled howitzer
crossed. According to Roblin, the development of the Bohdana, which could be traced back to a proposed truck-mounted design back in 2009, would only begin in
2S22_Bohdana
American actor and comedian (born 1955)
Catholic." Researcher Henry Louis Gates Jr. found that all of Goldberg's traceable ancestors were black, that she had no known Jewish ancestry, and that
Whoopi_Goldberg
American singer and songwriter (born 1958)
after graduation. Jackson worked as a construction worker and forklift operator while playing in small clubs across Georgia. When he was 27, Jackson and
Alan_Jackson
Matrix whose only nonzero elements are on its main diagonal
&a_{n}\end{bmatrix}}^{\textsf {T}}} using the diag {\displaystyle \operatorname {diag} } operator: D = diag ( a 1 , … , a n ) . {\displaystyle \mathbf {D} =\operatorname
Diagonal_matrix
President of the United States from 1929 to 1933
"undemocratic racist who saw blacks as a species of 'sub-men'". Some historians trace the disaffection of African-Americans with the Republican party to his time
Herbert_Hoover
Quantum-mechanical simulation framework
constant integration can then be carried out analytically. where the trace operator Tr ≡ ∬ d r d r ′ {\textstyle \operatorname {Tr} \equiv \iint drdr'}
Adiabatic connection fluctuation dissipation theorem
Adiabatic_connection_fluctuation_dissipation_theorem
Evil supernatural being
devils: minions of the Devil. In many traditions, demons are independent operators, with different demons causing different types of evils (destructive natural
Demon
Elliptic differential operators in geometry mathematics
connection Laplacian is often called the Laplace–Beltrami operator. It is defined as the trace of the second covariant derivative: Δ T = tr ∇ 2 T , {\displaystyle
Laplace operators in differential geometry
Laplace_operators_in_differential_geometry
In operator theory, a Toeplitz operator is the compression of a multiplication operator on the circle to the Hardy space. Let S 1 {\displaystyle S^{1}}
Toeplitz_operator
TRACE OPERATOR
TRACE OPERATOR
Girl/Female
Latin American English Irish
Grace.
Boy/Male
Anglo Saxon American English French
Brave.
Girl/Female
English American
from Thracia.
Girl/Female
American, Arabic, Australian, British, Chinese, Christian, Danish, English, French, German, Gujarati, Indian, Irish, Jamaican, Latin, Muslim, Portuguese, Swedish
Mercy; God's Favor; Grace; Grace of God; Kindness; Thanks; Love; Favour; Blessing; Charm; Good will
Girl/Female
Greek American French
Reaper; from Therasia.
Male
English
Variant spelling of English unisex Tracy, TRACEY means "place of Thracius."
Girl/Female
Greek American
Reap; from Therasia.
Female
English
Feminine variant spelling of English unisex Tracy, TRACI means "place of Thracius."
Surname or Lastname
English
English : perhaps a variant of Treece.
Boy/Male
Anglo Saxon American Latin Greek English French
Brave.
Male
English
English surname transferred to unisex forename use, from a Norman baronial name TRACY means "place of Thracius."
Surname or Lastname
English
English : nickname from Middle English, Old French grace ‘charm’, ‘pleasantness’ (Latin gratia).English : from the female personal name Grace, which was popular in the Middle Ages. This seems in the first instance to have been from a Germanic element grīs ‘gray’ (see Grice 1), but was soon associated by folk etymology with the Latin word meaning ‘charm’.
Male
English
Short form of English unisex Tracy, TRACE means "place of Thracius."
Female
English
Feminine variant spelling of English unisex Tracy, TRACEE means "place of Thracius."
Boy/Male
Anglo Saxon American Greek
Brave.
Surname or Lastname
English
English : probably from Middle English, Old French brace ‘arm’, also denoting a piece of armor covering the arm. In most cases it is probably a metonymic occupational name for a maker or seller of armor, specifically armor designed to protect the upper arms, but it could also have been a nickname for someone with strong arms (compare Armstrong) or a deformed or otherwise noticeable arm.
Surname or Lastname
English (Kent)
English (Kent) : perhaps a variant of Treece.Altered spelling of German Treis, a topographic name for someone who lived by or owned an uncultivated piece of land used as pasture, from Middle Low German drīsch ‘fallow land’, or a habitational name from a place named with this word (in Hessian dialect treis), in Hesse or on the Mosel river. Alternatively, in some instances it may be from a short form of the personal name Andreas (see Andrew).
Female
English
Feminine variant spelling of English unisex Tracy, TRACIE means "place of Thracius."
Girl/Female
English
from Thracia.
Boy/Male
American, Anglo, Australian, British, Chinese, English, French
Fighter; Brave
TRACE OPERATOR
TRACE OPERATOR
Girl/Female
Irish American
Feminine of Carl; joy.
Female
Egyptian
, a daughter of Sebekhotep III.
Boy/Male
Celtic American English
Harmony, stone, or noble. Also fair, handsome. Originally a saint's name, it was reintroduced to...
Boy/Male
Hindu
Lord Shiva or auspicious or Lucky
Girl/Female
Tamil
Kunjalata | கà¯à®‚ஜலதா
Forest creeper, Wild climber plant
Surname or Lastname
English (mainly Lancashire)
English (mainly Lancashire) : habitational name from a place in Lancashire, so called from Old English pīc ‘point’ + copp ‘top’, i.e. a hill with a sharp peak.
Boy/Male
Hindu
Summary
Boy/Male
Australian, Scottish
Reference to Castle Brodie in Scotland
Boy/Male
Muslim
Ne who collects booty
Girl/Female
Indian
Full of great happiness
TRACE OPERATOR
TRACE OPERATOR
TRACE OPERATOR
TRACE OPERATOR
TRACE OPERATOR
v.
The trade winds.
v. t.
To add grace notes, cadenzas, etc., to.
v. t.
To trace out; to track; also, to draw out; to protact.
n.
A mark left by something that has passed along; as, the track, or wake, of a ship; the track of a meteor; the track of a sled or a wheel.
v. t.
Hence, to follow the trace or track of.
v. t.
To supply with heavenly grace.
n.
A mark or impression left by the foot, either of man or beast; trace; vestige; footprint.
n.
A tract or area, as of land.
v.
Track; trace.
v. t.
To follow the tracks or traces of; to pursue by following the marks of the feet; to trace; to trail; as, to track a deer in the snow.
v.
Continuity or extension of anything; as, the tract of speech.
n.
One who, or that which, traces.
v.
A company of men engaged in the same occupation; thus, booksellers and publishers speak of the customs of the trade, and are collectively designated as the trade.
v. t.
To mark out; to draw or delineate with marks; especially, to copy, as a drawing or engraving, by following the lines and marking them on a sheet superimposed, through which they appear; as, to trace a figure or an outline; a traced drawing.
n.
Course; way; as, the track of a comet.
imp. & p. p.
of Trace
v. t.
To cause to contend in a race; to drive at high speed; as, to race horses.
v. t.
To run a race with.
v. t.
A mark left by anything passing; a track; a path; a course; a footprint; a vestige; as, the trace of a carriage or sled; the trace of a deer; a sinuous trace.
v. t.
To trace by scent; to track; -- a hunting term.