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Topics referred to by the same term
Look up rigidity or rigid in Wiktionary, the free dictionary. Rigid or rigidity may refer to: Stiffness, the property of a solid body to resist deformation
Rigidity
Concept in special relativity, governing a body's dynamics at high speeds
Born rigidity is a concept in special relativity. It is one answer to the question of what, in special relativity, corresponds to the rigid body of non-relativistic
Born_rigidity
Combinatorial theory of mechanics and discrete geometry
In discrete geometry and mechanics, structural rigidity is a combinatorial theory for predicting the flexibility of ensembles formed by rigid bodies connected
Structural_rigidity
Inertia of prices in economics
In economics, nominal rigidity, also referred to as price stickiness or wage stickiness, describes a situation in which a nominal price is slow to adjust
Nominal_rigidity
Mechanisms of overcoming risky behaviors
In psychology, rigidity, or mental rigidity, refers to an obstinate inability to yield or a refusal to appreciate another person's viewpoint or emotions
Rigidity_(psychology)
Resistance offered by a structure while bending
Flexural rigidity is defined as the force couple required to bend a fixed non-rigid structure by one unit of curvature, or as the resistance offered by
Flexural_rigidity
Fourth stage of death
mortis (from Latin rigor 'stiffness' and mortis 'of death'), or postmortem rigidity, is the fourth stage of death. It is one of the recognizable signs of death
Rigor_mortis
In particle physics, rigidity R {\displaystyle R} is a measure of the resistance of a particle to deflection by magnetic fields, defined as the particle's
Rigidity_(electromagnetism)
In discrete geometry, geometric rigidity is a theory for determining if a geometric constraint system (GCS) has finitely many d-dimensional solutions,
Geometric_rigidity
Resistance to deformation in response to force
Stiffness or rigidity is the extent to which an object resists deformation in response to an applied force. The inverse of stiffness is flexibility or
Stiffness
Theorem in hyperbolic geometry
In mathematics, Mostow's rigidity theorem, or strong rigidity theorem, or Mostow–Prasad rigidity theorem, essentially states that the geometry of a complete
Mostow_rigidity_theorem
additional structure in order to show that the desired morphism must exist. Rigidity theorem is about when a fairly weak equivalence between two manifolds (usually
Topological_rigidity
Class of algebraic theorems
Local rigidity theorems in the theory of discrete subgroups of Lie groups are results which show that small deformations of certain such subgroups are
Local_rigidity
Ratio of shear stress to shear strain
In solid mechanics, the shear modulus or modulus of rigidity, denoted by G, or sometimes S or μ, is a measure of the elastic shear stiffness of a material
Shear_modulus
Economic concept, a fixed price or wage
fixed to a relative value of another. Real rigidities can be distinguished from nominal rigidities, rigidities that do not adjust because prices can be
Real_rigidity
Stiffness of the neck
Neck stiffness, stiff neck and nuchal rigidity are terms often used interchangeably to describe the medical condition when one experiences discomfort or
Neck_stiffness
Topics referred to by the same term
Rigidity theory may refer to Study of the concept of rigidity (mathematics) Mathematical theory of structural rigidity Rigidity theory (physics), or topological
Rigidity_theory
Neurological disorder
neurological disorder of unclear cause characterized by progressive muscular rigidity and stiffness. The stiffness primarily affects the truncal muscles and
Stiff-person_syndrome
Abnormal increase in muscle tone due to nerve damage
Hypertonia is a term sometimes used synonymously with spasticity and rigidity in the literature surrounding damage to the central nervous system, namely
Hypertonia
Strange posture from brain injury
important in decerebrate rigidity due to studies in animals showing that dorsal-root transection eliminates decerebrate rigidity symptoms. Transection releases
Abnormal_posturing
Decreased movement due to basal ganglia dysfunction
needed] Hypokinesia is a symptom of Parkinson's disease shown as muscle rigidity and an inability to produce movement. It is also associated with mental
Hypokinesia
Movement of cells according to local rigidity gradient
by rigidity gradients, which arise from differential structural properties of the extracellular matrix (ECM). Most normal cells migrate up rigidity gradients
Durotaxis
Tensing of abdominal wall muscles to guard inflamed organs
original on 2013-03-22. Retrieved 2007-05-08. Abdominal Guarding - Abdominal Rigidity on Medicine Online Medical Articles Archived April 24, 2011, at the Wayback
Abdominal_guarding
Rigid three-dimensional load-bearing truss structure
supports. Like the truss, a space frame is strong because of the inherent rigidity of the triangle; flexing loads (bending moments) are transmitted as tension
Space_frame
Management discipline studying human transformational processes within organizations
appropriate. Threat rigidity can lead to employee disengagement. The return to office initiative has been in part attributed to threat rigidity. The contingency
Change_management
Property of mathematical objects
real line in the complex plane. The Schwarz lemma is an example of such a rigidity theorem. By the fundamental theorem of algebra, polynomials in C are rigid
Rigidity_(mathematics)
Type of function in mathematics
In mathematical analysis, an analytic function is a function that is locally represented by a convergent power series. More precisely, a real or complex
Analytic_function
Symptoms similar to meningitis but not caused by meningitis
adolescents. Meningism involves the triad (3-symptom syndrome) of nuchal rigidity (neck stiffness), photophobia (intolerance of bright light) and headache
Meningism
Condition in which damaged skeletal muscle breaks down rapidly
may cause neuroleptic malignant syndrome, which can cause severe muscle rigidity with rhabdomyolysis and hyperpyrexia Neuromuscular blocking agents used
Rhabdomyolysis
Syndrome characterized by tremor, slowed movements, rigidity, and imbalance
movements), rigidity, and postural instability. Both hypokinetic features (bradykinesia and akinesia) and hyperkinetic features (cogwheel rigidity and tremors
Parkinsonism
Side effect of opioids during anesthesia
rigidity of the chest following the administration of high doses of opioids during anesthesia. Wooden chest syndrome describes marked muscle rigidity
Wooden_chest_syndrome
Abnormal stiffness of skeletal muscle
exist). Spasticity can be differentiated from rigidity with the help of simple clinical examination, as rigidity is a uniform increase in the tone of agonist
Spasticity
Threshold of percolation theory models
between bonds p4,p1 and p2,p3. Assuming a finite graph with unbending bonds, rigidity percolation refers to a situation where the entire graph is rigid everywhere
Percolation_threshold
In mathematics, rigidity of K-theory encompasses results relating algebraic K-theory of different rings. Suslin rigidity, named after Andrei Suslin, refers
Rigidity_(K-theory)
Abstraction of bar-and-joint frameworks
In the mathematics of structural rigidity, a rigidity matroid is a matroid that describes the number of degrees of freedom of an undirected graph with
Rigidity_matroid
Sex toy
that is used as an aid in cases of impotence, that is, when sufficient rigidity of the organ for engaging in sexual intercourse cannot be achieved naturally
Penis_pump
Rigidity theorem for convex polyhedra
way that does not have the same shape. This is a fundamental result in rigidity theory: one consequence of the theorem is that, if one makes a physical
Cauchy's_theorem_(geometry)
Psychoactive drug, often called ecstasy
Hallucinations Loss of consciousness Serotonin syndrome Musculoskeletal Muscle rigidity Rhabdomyolysis (i.e., rapid muscle breakdown) Respiratory Acute respiratory
MDMA
Bounds the length of geodetic segments in Riemannian manifolds based in Ricci curvature
Myers's theorem, also known as the Bonnet–Myers theorem, is a celebrated, fundamental theorem in the mathematical field of Riemannian geometry. It was
Myers's_theorem
Abnormal maintenance of postures
"seizing, grasping") is a neurological condition characterized by muscular rigidity and fixity of posture regardless of external stimuli, as well as decreased
Catalepsy
President of the United States from 1901 to 1909
had been depressed by the formalistic treatment of many subjects, by the rigidity, the attention to minutiae that were important in themselves, but which
Theodore_Roosevelt
Country in East Asia
doi:10.1057/9781137465498_2. ISBN 978-1-349-49955-7. Ren, Mu (2021). Beyond Rigidity: China's Non-Intervention Policy in the Post-Cold War Period. Springer
China
American mathematician (1923–2017)
to 1992. The rigidity phenomenon for lattices in Lie groups he discovered and explored is known as Mostow rigidity. His work on rigidity played an essential
George_Mostow
Various molecular structures formed only by rotation about single bonds
In chemistry, rotamers are chemical species that differ from one another primarily due to rotations about one single bond. Various arrangements of atoms
Rotamer
Structural phenolic polymer in plant cell walls
formation of cell walls, especially in wood and bark, because they lend rigidity and do not rot easily. Chemically, lignins are polymers made by the cross-linking
Lignin
Light, strong and rigid composite material
are commonly used wherever high strength-to-weight ratio and stiffness (rigidity) are required, such as aerospace, superstructures of ships, automotive
Carbon fiber reinforced polymer
Carbon_fiber_reinforced_polymer
Type of bow for archery
This rigidity makes the compound bow more energy-efficient than traditional bows, as less energy is dissipated in limb movement. The higher-rigidity and
Compound_bow
American photographer and environmentalist (1902–1984)
produce a wide range of bold, expressive tones, and felt constricted by the rigidity of the color process. Most of his color work was done on assignments, and
Ansel_Adams
Phenomenon in convertible cars
in convertible or open top automobiles where, due to lower structural rigidity caused by the lack of a roof, the middle section of the chassis flexes
Scuttle_shake
Supreme law of the United States
Federalist No. 43, designed to establish a balance between pliancy and rigidity.[better source needed] Article Five ends by shielding certain clauses in
Constitution of the United States
Constitution_of_the_United_States
games. This theorem relies on the definitions of genericity in structural rigidity. Let V(E) denote the vertex set of a set of edges E. Geiringer-Laman Theorem
Geiringer–Laman_theorem
Chemical element with atomic number 51 (Sb)
improved properties for solders, bullets, and plain bearings. It improves the rigidity of lead-alloy plates in lead–acid batteries. Antimony trioxide is a prominent
Antimony
Characteristic of a spinning body in space
(also called gyroscopic stiffness, gyroscopic inertia, gyroscopic rigidity, or "rigidity in space") is the characteristic of a rotating body in which the
Axial_parallelism
time version. The Calvo model is the most common way to model nominal rigidity in new Keynesian DSGE macroeconomic models. We can define the probability
Calvo_(staggered)_contracts
Testable implication of local hidden-variable theories
the rigidity of the CHSH game, first attributed to Summers and Werner. More formally, we have the following result: Theorem (Exact CHSH rigidity)—Let
CHSH_inequality
Postmortem stiffening of a muscle
postmortem spasm, instantaneous rigor mortis, cataleptic rigidity, or instantaneous rigidity, is a rare form of muscular stiffening that occurs at the
Cadaveric_spasm
Thermoplastic polymer
rigidity, while increasing the heat deflection temperature. The styrene gives the plastic a shiny, impervious surface, as well as hardness, rigidity,
Acrylonitrile butadiene styrene
Acrylonitrile_butadiene_styrene
word is formed from PENis RIGidity. Viral, R.; Viral, H.; Lajujie, J. (1985), "A new device for measuring penile rigidity", Urology, 25 (1): 80–81, doi:10
Penrig
In physics, rigidity theory, or topological constraint theory, is a tool for predicting properties of complex networks (such as glasses) based on their
Rigidity_theory_(physics)
Medical condition of the brain
the PSP-Parkinson (PSP-P) subtype which is characterized by asymmetric rigidity, resting tremor, and are more responsive to dopamine therapies such as
Progressive supranuclear palsy
Progressive_supranuclear_palsy
Inflammation of abdominal organ lining
peritonitis are acute abdominal pain, abdominal tenderness, abdominal guarding, rigidity, which are exacerbated by moving the peritoneum, e.g., coughing (forced
Peritonitis
Battle of the Third Macedonian War in 168 BC
manipular system's flexibility over the Antigonid Macedonian phalanx's rigidity. The Third Macedonian War started in 171 BC, after a number of acts on
Battle_of_Pydna
Theorem in solid mechanics
states that the simply connected cross section with maximal torsional rigidity is a circle. It is named after the French mathematician Adhémar Jean Claude
Saint-Venant's_theorem
1847 novel by Emily Brontë
remedies for some clearly unfair (inequitable) systematic outcomes from the rigidity of the common law. In addition, inheritance of property in towns was commonly
Wuthering_Heights
Joint stiffness due to abnormal adhesion or rigidity of the articulating bones
due to abnormal adhesion and rigidity of the bones of the joint, which may be the result of injury or disease. The rigidity may be complete or partial and
Ankylosis
Progressive neurodegenerative disease
parkinsonism, include tremors, slowness in initiating movement (bradykinesia), rigidity, and difficulty maintaining balance (postural instability). Non-motor symptoms
Parkinson's_disease
U.S. national technical standards for threads on pipes and pipe fittings
both tapered and straight thread series for various purposes, including rigidity, pressure-tight sealing, or both. The types are named with a full name
National_pipe_thread
Method of increasing rigidity and structural integrity of materials or objects
Stiffening is any process that increases the rigidity and structural integrity of objects. Stiffening is used in crafts, art, industry, architecture, sports
Stiffening
Parameters describing a planet's rigidity
Love numbers (h, k, and l) are dimensionless parameters that measure the rigidity of a planetary body or other gravitating object, and the susceptibility
Love_number
Change in the shape or size of an object
object's intrinsic resistance to deformation is known as its stiffness or rigidity. If the deformation is negligible under stress, the object is said to be
Deformation_(engineering)
School of macroeconomics
showed in 1990 that real rigidities could interact with nominal rigidities to create significant disequilibrium. Real rigidities occur whenever a firm is
New_Keynesian_economics
French mathematician (born 1948)
simpler proof of the Mostow rigidity theorem. The result of Besson, Courtois, and Gallo is called minimal entropy rigidity. In 1998 he was an invited speaker
Sylvestre_Gallot
Romanian and American actor (born 1982)
audiences, but commended Stan for evoking genuine sympathy despite the rigidity of the character's beliefs; similarly, Deadline Hollywood's Pete Hammond
Sebastian_Stan
Mathematical puzzle of avoiding crossings
and early 20th-century publications both in early studies of structural rigidity and in chemical graph theory, where Julius Thomsen proposed it in 1886
Three_utilities_problem
Austrian American mathematician
(born 1954) is a mathematician specializing in matroids and structural rigidity. She is a professor of mathematics at Worcester Polytechnic Institute,
Brigitte_Servatius
Shape with three sides
i.e. the angles cannot be adjusted. Triangles are strong in terms of rigidity, but while packed in a tessellating arrangement triangles are not as strong
Triangle
Seventh-generation Mercedes-Benz SL-Class
body structure developed by AMG to provide more rigidity. Transverse rigidity and longitudinal rigidity are said to be 50% and 40% higher, respectively
Mercedes-Benz_SL_(R232)
In the mathematical field of differential geometry, a Codazzi tensor (named after Delfino Codazzi) is a symmetric 2-tensor whose covariant derivative is
Codazzi_tensor
Discrete subgroup in a locally compact topological group
algebraic groups over local fields. In particular there is a wealth of rigidity results in this setting, and a celebrated theorem of Grigory Margulis states
Lattice_(discrete_subgroup)
Proposed class of American super-battleships
the torpedo bulkheads had detrimental flooding effects due to the belt's rigidity. South Dakota's and Iowa's systems were modified in light of these tests
Montana-class_battleship
Sociological term for "normlessness"
mismatch, not simply the absence of norms. Thus, a society with too much rigidity and little individual discretion could also produce a kind of anomie .
Anomie
Part of the body that forms the supporting structure
external skeletons are exoskeletons. Skeletons may also be defined by rigidity, where pliant skeletons are more elastic than rigid skeletons. Fluid or
Skeleton
Severe reaction to general anesthesia
general anesthesia, among those who are susceptible. Symptoms include muscle rigidity, fever, and a fast heart rate. Complications can include muscle breakdown
Malignant_hyperthermia
Total market value of goods and services produced within a country
Adaptive Rational Government debt Investment Saving Microfoundations Nominal rigidity Shocks Demand Supply Policies Fiscal Austerity Government spending Welfare
Gross_domestic_product
Scottish physicist and mathematician (1831–1879)
and blue, the basis for colour television. He worked on analysing the rigidity of rod-and-joint frameworks (trusses) like those in many bridges. He devised
James_Clerk_Maxwell
Back of the neck
marrow'). The corresponding adjective is nuchal, as in the term nuchal rigidity for neck stiffness. In many mammals, the nape bears a loose, non-sensitive
Nape
Branch of geometry that studies combinatorial properties and constructive methods
Quasicrystals Aperiodic tilings Periodic graph Finite subdivision rules Structural rigidity is a combinatorial theory for predicting the flexibility of ensembles formed
Discrete_geometry
Former empire (c. 1299–1922)
adjustments occurred in the Ottoman and Safavid realms defined by a new rigidity that favoured Ottoman Turkish and Persian, respectively. In the Ottoman
Ottoman_Empire
Outermost layer of some cells
rigidity of primary plant tissues is enabled by cell walls, but is not due to the walls' stiffness. Hydraulic turgor pressure creates this rigidity,
Cell_wall
Form of sexual dysfunction in males
recurring inability to achieve or maintain a penile erection with sufficient rigidity and duration for satisfactory sexual activity. It is the most common sexual
Erectile_dysfunction
X-shaped support substructure
to any rectangular frame structure, such as chairs and bookshelves. Its rigidity for two-dimensional grid structures can be analyzed mathematically as an
Cross_bracing
Geometric progression ratio that provides a constant rate of return over the time period
Adaptive Rational Government debt Investment Saving Microfoundations Nominal rigidity Shocks Demand Supply Policies Fiscal Austerity Government spending Welfare
Compound_annual_growth_rate
Full-size luxury crossover SUV
rigidity and minimize noise, vibration, and harshness (NVH). Welds and adhesives are featured to increase the vehicle’s joint strength and rigidity through
Lexus_TX
Motor vehicle
The Lotus Seven is a sports car produced by the British manufacturer Lotus Cars (initially called Lotus Engineering) between 1957 and 1973. The Seven is
Lotus_Seven
Structure connecting boot to wheels
allowing the ball of the foot to sit nearly as low as the wheel tops. Frame rigidity is essential for an efficient transfer of power from a skater's foot to
Inline_skate_frame
American economist (1959–2026)
Adaptive Rational Government debt Investment Saving Microfoundations Nominal rigidity Shocks Demand Supply Policies Fiscal Austerity Government spending Welfare
Perry_Mehrling
Vehicle with a folding or removable roof
required. A potential drawback of convertibles is their reduced structural rigidity (requiring significant engineering and modification to counteract the side
Convertible
American psychologist
of Western Ontario Washington State University University of Southern California Thesis Generalized mental rigidity as a factor in ethnocentrism (1947)
Milton_Rokeach
Chemical compound
PET (polyethylene terephthalate), PBT has slightly lower strength and rigidity, slightly better impact resistance, and a slightly lower glass transition
Polybutylene_terephthalate
Symptoms associated with the extrapyramidal system of the brain
manifest as motor restlessness), parkinsonism characteristic symptoms such as rigidity, bradykinesia (slowness of movement), tremor, and tardive dyskinesia (irregular
Extrapyramidal_symptoms
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