Theorem wcomcom4 399

Description: Commutation equivalence. Kalmbach 83 p. 23.

Hypothesis

Ref	Expression
wcomcom.1	C (a, b) = 1

Assertion

Ref	Expression
wcomcom4	C (a_|_, b_|_) = 1

Proof of Theorem wcomcom4

Step	Hyp	Ref	Expression
1		wcomcom.1	. . 3 C (a, b) = 1
2	1	wcomcom3 398	. 2 C (a_|_, b) = 1
3	2	wcomcom2 397	1 C (a_|_, b_|_) = 1

Syntax hints:   = wb 1  _|_wn 4  1wt 9   C wcmtr 28

This theorem is referenced by:  wcomd 400  wcomcom5 402  wfh3 407  wfh4 408  wcom2an 410  wlem14 412

This theorem was proved from axioms:  ax-a1 29  ax-a2 30  ax-a3 31  ax-a4 32  ax-a5 33  ax-r1 34  ax-r2 35  ax-r4 36  ax-r5 37  ax-wom 343

This theorem depends on definitions:  df-b 38  df-a 39  df-t 40  df-f 41  df-i1 43  df-i2 44  df-le 121  df-le1 122  df-le2 123  df-cmtr 126

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