Theorem pm2.521 154

Description: Theorem *2.521 of [WhiteheadRussell] p. 107. (Contributed by NM, 3-Jan-2005.) (Proof shortened by Wolf Lammen, 8-Oct-2012.)

Assertion

Ref	Expression
pm2.521

Proof of Theorem pm2.521

Step	Hyp	Ref	Expression
1		simplim 151	. 2
2	1	a1d 25	1

Syntax hints:  -.wn 3  ->wi 4

This theorem is referenced by:  pm2.52  155  bj-ifimim  37716

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8