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Theorem csbconstg 3150
 Description: Substitution doesn't affect a constant B (in which x is not free). csbconstgf 3149 with distinct variable requirement. (Contributed by Alan Sare, 22-Jul-2012.)
Assertion
Ref Expression
csbconstg (A V[A / x]B = B)
Distinct variable group:   x,B
Allowed substitution hints:   A(x)   V(x)

Proof of Theorem csbconstg
StepHypRef Expression
1 nfcv 2489 . 2 xB
21csbconstgf 3149 1 (A V[A / x]B = B)
 Colors of variables: wff setvar class Syntax hints:   → wi 4   = wceq 1642   ∈ wcel 1710  [csb 3136 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1925  ax-ext 2334 This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-clab 2340  df-cleq 2346  df-clel 2349  df-nfc 2478  df-v 2861  df-sbc 3047  df-csb 3137 This theorem is referenced by:  sbcel1g  3155  sbceq1g  3156  sbcel2g  3157  sbceq2g  3158  csbidmg  3190  sbcbr12g  4686  sbcbr1g  4687  sbcbr2g  4688  csbresg  4976  csbfv12g  5336  csbfv2g  5337  csbov12g  5553  csbov1g  5554  csbov2g  5555
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