---------------------------------------------------------------------- MOD_CONV (reduceLib) ---------------------------------------------------------------------- MOD_CONV : conv SYNOPSIS Calculates by inference the remainder after dividing one numeral by another. LIBRARY reduce DESCRIBE If {m} and {n} are numerals (e.g. {0}, {1}, {2}, {3},...), then {MOD_CONV "m MOD n"} returns the theorem: |- m MOD n = s where {s} is the numeral that denotes the remainder after dividing, with truncation, the natural number denoted by {m} by the natural number denoted by {n}. FAILURE {MOD_CONV tm} fails unless {tm} is of the form {"m MOD n"}, where {m} and {n} are numerals, or if {n} denotes zero. EXAMPLE #MOD_CONV "0 MOD 0";; evaluation failed MOD_CONV #MOD_CONV "0 MOD 12";; |- 0 MOD 12 = 0 #MOD_CONV "2 MOD 0";; evaluation failed MOD_CONV #MOD_CONV "144 MOD 12";; |- 144 MOD 12 = 0 #MOD_CONV "7 MOD 2";; |- 7 MOD 2 = 1 ----------------------------------------------------------------------