42

REVIEWS

H.

B.

CURRY.

A

note

on the

associative

law

in

logical

algebras.

Bulletin

of the

American

Mathematical Society, vol. 42 (1936), pp. 523-524.

A generalization

of

Bernays‘ proof

of

the redundancy

of

the associative law

in

Part

I

Section A

of Principia mathematica, showing that

any

system, containing

a

binary operation (denoted

by

juxtaposition) and

a

relation,

<,