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Theorem tposidf1o 49917
Description: The swap function, or the twisting map, is bijective. (Contributed by Zhi Wang, 5-Oct-2025.)
Assertion
Ref Expression
tposidf1o tpos ( I ↾ (𝐴 × 𝐵)):(𝐵 × 𝐴)–1-1-onto→(𝐴 × 𝐵)

Proof of Theorem tposidf1o
StepHypRef Expression
1 f1oi 6851 . 2 ( I ↾ (𝐴 × 𝐵)):(𝐴 × 𝐵)–1-1-onto→(𝐴 × 𝐵)
2 tposf1o 49914 . 2 (( I ↾ (𝐴 × 𝐵)):(𝐴 × 𝐵)–1-1-onto→(𝐴 × 𝐵) → tpos ( I ↾ (𝐴 × 𝐵)):(𝐵 × 𝐴)–1-1-onto→(𝐴 × 𝐵))
31, 2ax-mp 5 1 tpos ( I ↾ (𝐴 × 𝐵)):(𝐵 × 𝐴)–1-1-onto→(𝐴 × 𝐵)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   I cid 5541   × cxp 5645  cres 5649  1-1-ontowf1o 6526  tpos ctpos 8220
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2213  ax-ext 2732  ax-sep 5248  ax-nul 5259  ax-pow 5326  ax-pr 5390  ax-un 7734
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-dif 3901  df-un 3903  df-in 3905  df-ss 3915  df-nul 4279  df-if 4482  df-pw 4558  df-sn 4584  df-pr 4586  df-op 4590  df-uni 4867  df-br 5103  df-opab 5167  df-mpt 5186  df-id 5542  df-xp 5653  df-rel 5654  df-cnv 5655  df-co 5656  df-dm 5657  df-rn 5658  df-res 5659  df-ima 5660  df-iota 6483  df-fun 6529  df-fn 6530  df-f 6531  df-f1 6532  df-fo 6533  df-f1o 6534  df-fv 6535  df-1st 7984  df-2nd 7985  df-tpos 8221
This theorem is used by: (None)
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