homotopy invariant - ορισμός. Τι είναι το homotopy invariant
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Τι (ποιος) είναι homotopy invariant - ορισμός

CONTINUOUS DEFORMATION BETWEEN TWO CONTINUOUS MAPS
Homotopic; Homotopy equivalent; Homotopy equivalence; Homotopy invariant; Homotopy class; Null-homotopic; Homotopy type; Nullhomotopic; Homotopy invariance; Homotopy of maps; Homotopically equivalent; Homotopic maps; Homotopy of paths; Homotopical; Homotopy classes; Null-homotopy; Null homotopy; Nullhomotopic map; Null homotopic; Relative homotopy; Homotopy retract; Continuous deformation; Relative homotopy class; Homotopy-equivalent; Homotopy extension and lifting property; Isotopy (topology); Homotopies
  • paths]] shown above are homotopic relative to their endpoints. The animation represents one possible homotopy.
  • isotopy]].

Homotopy         
In topology, a branch of mathematics, two continuous functions from one topological space to another are called homotopic (from "same, similar" and "place") if one can be "continuously deformed" into the other, such a deformation being called a homotopy (, ; , ) between the two functions. A notable use of homotopy is the definition of homotopy groups and cohomotopy groups, important invariants in algebraic topology.
Invariant (physics)         
IN MATHEMATICS AND THEORETICAL PHYSICS, PROPERTY OF A SYSTEM WHICH REMAINS UNCHANGED UNDER SOME TRANSFORMATION
Invariance (physics); Invariant quantity
In theoretical physics, an invariant is an observable of a physical system which remains unchanged under some transformation. Invariance, as a broader term, also applies to the no change of form of physical laws under a transformation, and is closer in scope to the mathematical definition.
Invariant (mathematics)         
  • operation]] denoted by <math>\circ</math> is the [[function composition]].
PROPERTY OF MATHEMATICAL OBJECTS THAT REMAINS UNCHANGED FOR TRANSFORMATIONS APPLIED TO THE OBJECTS
Invariant (computer science); Invariance (mathematics); Coordinate system invariant; Invariant set; Coordinate invariance; Coordinate system invariance; Programming invariant
In mathematics, an invariant is a property of a mathematical object (or a class of mathematical objects) which remains unchanged after operations or transformations of a certain type are applied to the objects. The particular class of objects and type of transformations are usually indicated by the context in which the term is used.

Βικιπαίδεια

Homotopy

In topology, a branch of mathematics, two continuous functions from one topological space to another are called homotopic (from Ancient Greek: ὁμός homós "same, similar" and τόπος tópos "place") if one can be "continuously deformed" into the other, such a deformation being called a homotopy (, hə-MO-tə-pee; , HOH-moh-toh-pee) between the two functions. A notable use of homotopy is the definition of homotopy groups and cohomotopy groups, important invariants in algebraic topology.

In practice, there are technical difficulties in using homotopies with certain spaces. Algebraic topologists work with compactly generated spaces, CW complexes, or spectra.