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-rw-r--r--src/algebra/integer.spad.pamphlet2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/algebra/integer.spad.pamphlet b/src/algebra/integer.spad.pamphlet
index 5806c706..ba924720 100644
--- a/src/algebra/integer.spad.pamphlet
+++ b/src/algebra/integer.spad.pamphlet
@@ -205,6 +205,8 @@ Integer: IntegerNumberSystem with
zero? p => unitCanonical q
zero? q => unitCanonical p
gcd([p,q])$HeuGcd(ZP)
+ opposite?(x,y) == x = -y
+ annihilate?(x,y) == zero? x or zero? y
-- myNextPrime: (%,NonNegativeInteger) -> %
-- myNextPrime(x,n) ==
-- nextPrime(x)$IntegerPrimesPackage(%)