## Invariant

**Invariant** and **invariance** may have several meanings, among which are:

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### Some articles on invariant:

Link Concordance - Concordance

... A function of a link that is

**Invariant**s... A function of a link that is

**invariant**under concordance is called a concordance**invariants**... of a link is one of the most elementary concordance**invariants**... The signature of a knot is also a concordance**invariant**...**Invariant**- Other Uses

...

**Invariant**(music) Writer

**invariant**, property of a text which is similar in all texts of a given author, and different in texts of different authors ...

Casson

... In 3-dimensional topology, a part of the mathematical field of geometric topology, the Casson

**Invariant**... In 3-dimensional topology, a part of the mathematical field of geometric topology, the Casson

**invariant**is an integer-valued**invariant**of oriented integral homology 3-spheres ... (1992) found an extension to rational homology 3-spheres, called the Casson-Walker**invariant**, and Christine Lescop (1995) extended the**invariant**to all closed oriented 3-manifolds ...Stallings Theorem About Ends Of Groups - Ends of Groups - Cuts and Almost

... A subset A ⊆ G is called almost

**Invariant**Sets... A subset A ⊆ G is called almost

**invariant**if for every g∈G the symmetric difference between A and Ag is finite ... a cut if and only if the sets A and A∗ are almost**invariant**(equivalently, if and only if the set A is almost**invariant**) ...Lagrange

... In optics the Lagrange

**Invariant**... In optics the Lagrange

**invariant**is a measure of the light propagating through an optical system ... For a given optical system, the Lagrange**invariant**is a constant throughout all space, that is, it is**invariant**upon refraction and transfer ... The optical**invariant**is a generalization of the Lagrange**invariant**which is formed using the ray heights and angles of any two rays ...### More definitions of "invariant":

- (
*adj*): Unaffected by a designated operation or transformation.

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