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*Definition*: term (**such** `x`: `F`)

- Takes variable
`x`and formula`F`. - Constructs term where
`x`is bound. - Value is some
`x`such that`F`holds (if such an`x`exists).

New Axiom:

( existsx:F) => (forallx:x= (suchx:F) =>F),

*If* an object with property `F` exists, then the value of
the "such term" satisfies `F` as well.

Author: Wolfgang Schreiner

Last Modification: October 14, 1999