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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | )abbrev category LALG LeftAlgebra
++ Author: Larry A. Lambe
++ Date : 03/01/89; revised 03/17/89; revised 12/02/90.
++ Description:
++ The category of all left algebras over an arbitrary ring.
LeftAlgebra(R) : Category == SIG where
R : Ring
SIG ==> Join(Ring, LeftModule(R)) with
coerce: R -> %
++ coerce(r) returns r * 1 where 1 is the identity of the
++ left algebra.
add
coerce(x:R):% == x * 1$%
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