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Theorem bj-xpimasn 36140
Description: The image of a singleton, general case. [Change and relabel xpimasn 6185 accordingly, maybe to xpima2sn.] (Contributed by BJ, 6-Apr-2019.)
Assertion
Ref Expression
bj-xpimasn ((𝐴 × 𝐵) “ {𝑋}) = if(𝑋𝐴, 𝐵, ∅)

Proof of Theorem bj-xpimasn
StepHypRef Expression
1 xpima 6182 . 2 ((𝐴 × 𝐵) “ {𝑋}) = if((𝐴 ∩ {𝑋}) = ∅, ∅, 𝐵)
2 disjsn 4716 . . 3 ((𝐴 ∩ {𝑋}) = ∅ ↔ ¬ 𝑋𝐴)
3 eqid 2731 . . 3 𝐵 = 𝐵
42, 3ifbieq2i 4554 . 2 if((𝐴 ∩ {𝑋}) = ∅, ∅, 𝐵) = if(¬ 𝑋𝐴, ∅, 𝐵)
5 ifnot 4581 . 2 if(¬ 𝑋𝐴, ∅, 𝐵) = if(𝑋𝐴, 𝐵, ∅)
61, 4, 53eqtri 2763 1 ((𝐴 × 𝐵) “ {𝑋}) = if(𝑋𝐴, 𝐵, ∅)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3   = wceq 1540  wcel 2105  cin 3948  c0 4323  ifcif 4529  {csn 4629   × cxp 5675  cima 5680
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1912  ax-6 1970  ax-7 2010  ax-8 2107  ax-9 2115  ax-10 2136  ax-11 2153  ax-12 2170  ax-ext 2702  ax-sep 5300  ax-nul 5307  ax-pr 5428
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 845  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1781  df-nf 1785  df-sb 2067  df-mo 2533  df-eu 2562  df-clab 2709  df-cleq 2723  df-clel 2809  df-nfc 2884  df-ne 2940  df-ral 3061  df-rab 3432  df-v 3475  df-dif 3952  df-un 3954  df-in 3956  df-ss 3966  df-nul 4324  df-if 4530  df-sn 4630  df-pr 4632  df-op 4636  df-br 5150  df-opab 5212  df-xp 5683  df-rel 5684  df-cnv 5685  df-dm 5687  df-rn 5688  df-res 5689  df-ima 5690
This theorem is referenced by:  bj-xpima1sn  36141  bj-xpima2sn  36143
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