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*Definition:* *conditional term*

( ifFthenT_{0}elseT_{1})

- Formula
`F`, terms`T`_{0}and`T`_{1} - Result is
`T`_{0}, if`F`holds, and`T`_{1}, otherwise.

*Definition:* *conditional formula*

( ifFthenF_{0}elseF_{1})

- Formulas
`F`,`F`_{0},`F`_{1}. - Result is
`F`_{0}, if`F`holds, and`F`_{1}, otherwise.

Author: Wolfgang Schreiner

Last Modification: October 14, 1999