Theorem bdccsb 15357

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

Hypothesis

Ref	Expression
bdccsb.1	|- BOUNDED A

Assertion

Ref	Expression
bdccsb	|- BOUNDED [_ y / x ]_ A

Proof of Theorem bdccsb

Dummy variable z is distinct from all other variables.

Step	Hyp	Ref	Expression
1		bdccsb.1	. . . . 5 |- BOUNDED A
2	1	bdeli 15343	. . . 4 |- BOUNDED z e. A
3	2	bdsbc 15355	. . 3 |- BOUNDED [. y / x ]. z e. A
4	3	bdcab 15346	. 2 |- BOUNDED { z | [. y / x ]. z e. A }
5		df-csb 3081	. 2 |- [_ y / x ]_ A = { z | [. y / x ]. z e. A }
6	4, 5	bdceqir 15341	1 |- BOUNDED [_ y / x ]_ A

Syntax hints:   e. wcel 2164   {cab 2179   [.wsbc 2985   [_csb 3080  BOUNDED wbdc 15337

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 1458  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-4 1521  ax-17 1537  ax-ial 1545  ax-ext 2175  ax-bd0 15310  ax-bdsb 15319

This theorem depends on definitions:  df-bi 117  df-clab 2180  df-cleq 2186  df-clel 2189  df-sbc 2986  df-csb 3081  df-bdc 15338

This theorem is referenced by: (None)