Theorem wle1 371

Description: Anything is l.e. 1.

Assertion

Ref	Expression
wle1	(a ≤2 1) = 1

Proof of Theorem wle1

Step	Hyp	Ref	Expression
1		or1 96	. . 3 (a ∪ 1) = 1
2	1	bi1 110	. 2 ((a ∪ 1) ≡ 1) = 1
3	2	wdf-le1 360	1 (a ≤2 1) = 1

Syntax hints:   = wb 1   ∪ wo 6  1wt 9   ≤₂ wle2 11

This theorem was proved from axioms:  ax-a1 29  ax-a2 30  ax-a4 32  ax-a5 33  ax-r1 34  ax-r2 35  ax-r4 36  ax-r5 37

This theorem depends on definitions:  df-b 38  df-a 39  df-t 40  df-f 41  df-le 121

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