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Theorem idpfv 26533
Description: Value of the identity polynomial. (Contributed by SN, 30-Aug-2026.)
Assertion
Ref Expression
idpfv (𝐴 ∈ ℂ → (Xp‘𝐴) = 𝐴)

Proof of Theorem idpfv
StepHypRef Expression
1 df-idp 26512 . . 3 Xp = ( I ↾ ℂ)
21fveq1i 6886 . 2 (Xp‘𝐴) = (( I ↾ ℂ)‘𝐴)
3 fvresi 7178 . 2 (𝐴 ∈ ℂ → (( I ↾ ℂ)‘𝐴) = 𝐴)
42, 3eqtrid 2807 1 (𝐴 ∈ ℂ → (Xp‘𝐴) = 𝐴)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   = wceq 1569   ∈ wcel 2144   I cid 5544   ↾ cres 5652  ‘cfv 6538  ℂcc 11201  Xpcidp 26508
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-10 2177  ax-12 2212  ax-ext 2732  ax-sep 5248  ax-pr 5390
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2099  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-ss 3896  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-br 5103  df-opab 5167  df-id 5545  df-xp 5656  df-rel 5657  df-cnv 5658  df-co 5659  df-dm 5660  df-res 5662  df-iota 6494  df-fun 6540  df-fv 6546  df-idp 26512
This theorem is used by:  qaa  26652
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