### Some articles on *homotopic*:

Homotopy - Formal Definition - Properties

... Continuous functions f and g are said to be

... Continuous functions f and g are said to be

**homotopic**if and only if there is a homotopy H taking f to g as described above ... Being**homotopic**is an equivalence relation on the set of all continuous functions from X to Y ... in the following sense if f1, g1 X → Y are**homotopic**, and f2, g2 Y → Z are**homotopic**, then their compositions f2 ∘ f1 and g2 ∘ g1 X → Z are also**homotopic**...Homotopy Equivalence - Null-homotopy

... A function f is said to be null-

... A function f is said to be null-

**homotopic**if it is**homotopic**to a constant function ... a map from the circle S1 is null-**homotopic**precisely when it can be extended to a map of the disc D2 ... is always a homotopy equivalence—is null-**homotopic**...Topicity -

...

**Homotopic**...

**Homotopic**groups in a chemical compound are equivalent groups ... Two groups A and B are**homotopic**if the molecule remains the same (including stereochemically) when the groups are interchanged with the remaining parts of the molecule fixed ...**Homotopic**atoms are always identical, in any environment ...Contractible Space

... if the identity map on X is null-

... if the identity map on X is null-

**homotopic**, i.e ... if it is**homotopic**to some constant map ... the identity map is null-**homotopic**) ...Homotopy Category Of Chain Complexes

... that is, we define an equivalence relation if f is

... that is, we define an equivalence relation if f is

**homotopic**to g and define to be the quotient by this relation ... taking the quotient by the subgroup of null-**homotopic**maps ... In detail, this means there is another map, such that the two compositions are**homotopic**to the identities and ...Main Site Subjects

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