Theorem bdsbc 14963

Description: A formula resulting from proper substitution of a setvar for a setvar in a bounded formula is bounded. See also bdsbcALT 14964. (Contributed by BJ, 16-Oct-2019.)

Hypothesis

Ref	Expression
bdcsbc.1	|- BOUNDED ph

Assertion

Ref	Expression
bdsbc	|- BOUNDED [. y / x ]. ph

Proof of Theorem bdsbc

Step	Hyp	Ref	Expression
1		bdcsbc.1	. . 3 |- BOUNDED ph
2	1	ax-bdsb 14927	. 2 |- BOUNDED [ y / x ] ph
3		sbsbc 2978	. 2 |- ( [ y / x ] ph <-> [. y / x ]. ph )
4	2, 3	bd0 14929	1 |- BOUNDED [. y / x ]. ph

Syntax hints:   [wsb 1772   [.wsbc 2974  BOUNDED wbd 14917

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1457  ax-gen 1459  ax-ie1 1503  ax-ie2 1504  ax-4 1520  ax-17 1536  ax-ial 1544  ax-ext 2169  ax-bd0 14918  ax-bdsb 14927

This theorem depends on definitions:  df-bi 117  df-clab 2174  df-cleq 2180  df-clel 2183  df-sbc 2975

This theorem is referenced by:  bdccsb  14965