To be equivalent or equal to; to counterbalance.
The quantity of the combining power of an atom, expressed in hydrogen units; the number of hydrogen atoms can combine with, or be exchanged for; valency.
A number in intersection theory. A positive-dimensional variety sometimes behaves formally as if it were a finite number of points; this number is its equivalence.
An equivalence relation; ≡; ~
A Boolean operation that is TRUE when both input variables are TRUE or both input variables are FALSE, but otherwise FALSE; the XNOR function.
The condition of being equivalent or essentially equal.
The relationship between two propositions that are either both true or both false.
The degree to which a term or text in one language is semantically similar to its translated counterpart.
Any competition with a very close outcome.
The finish of a race in which the leaders are so close together that the winner cannot be identified using the naked eye but is determined by means of a photograph.