Theorem ssidd 3046

Description: Weakening of ssid 3045. (Contributed by BJ, 1-Sep-2022.)

Assertion

Ref	Expression
ssidd	|- ( ph -> A C_ A )

Proof of Theorem ssidd

Step	Hyp	Ref	Expression
1		ssid 3045	. 2 |- A C_ A
2	1	a1i 9	1 |- ( ph -> A C_ A )

Syntax hints:   -> wi 4   C_ wss 3000

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-5 1382  ax-7 1383  ax-gen 1384  ax-ie1 1428  ax-ie2 1429  ax-8 1441  ax-11 1443  ax-4 1446  ax-17 1465  ax-i9 1469  ax-ial 1473  ax-i5r 1474  ax-ext 2071

This theorem depends on definitions:  df-bi 116  df-nf 1396  df-sb 1694  df-clab 2076  df-cleq 2082  df-clel 2085  df-in 3006  df-ss 3013

This theorem is referenced by:  iisum  10836  fisumser  10851  fsumcl  10855