# tangency

## Definitions

• WordNet 3.6
• n tangency (electronics) a junction where things (as two electrical conductors) touch or are in physical contact "they forget to solder the contacts"
• n tangency the state of being tangent; having contact at a single point or along a line without crossing
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Webster's Revised Unabridged Dictionary
• n Tangency The quality or state of being tangent; a contact or touching.
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Century Dictionary and Cyclopedia
• n tangency The state of being tangent; a contact or touching. Also called taction.
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Chambers's Twentieth Century Dictionary
• ns Tangency state of being tangent: a contact or touching
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## Etymology

Chambers's Twentieth Century Dictionary
L. tangens, -entis, pr.p. of tangĕre, to touch.

## Usage

### In literature:

We can then conceive all the intricacies of tangency.
"The Concept of Nature" by Alfred North Whitehead
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### In science:

The advantage of working with random walks of packings, rather then with simple random walks of their tangency graphs, is that there exist non-trivial harmonic functions associated with them which have a geometric interpretation.
Random walks of circle packings
Clearly, for s, a generic curve with a point of an inverse self-tangency (see 5.1.1), there is a unique T − -equivalence class associated to it.
Arnold-type Invariants of Curves on Surfaces
It maps t− ∈ T − to such t− ∈ T − , that there exists s (a generic curve with an inverse self-tangency point), for which [s− ] = t− and [s− ] = t− .
Arnold-type Invariants of Curves on Surfaces
C ⊂ T − be the set of all the T − -equivalence classes corresponding to generic curves (from C ) with a point of an inverse self-tangency.
Arnold-type Invariants of Curves on Surfaces
When we go along this path we see a sequence of crossings of the self-tangency and of the triple point strata of the discriminant.
Arnold-type Invariants of Curves on Surfaces
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