| Mathbox for Zhi Wang |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > tposid | Structured version Visualization version GIF version | ||
| Description: Swap an ordered pair. (Contributed by Zhi Wang, 5-Oct-2025.) |
| Ref | Expression |
|---|---|
| tposid | ⊢ (𝑋tpos I 𝑌) = 〈𝑌, 𝑋〉 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ovtpos 8242 | . 2 ⊢ (𝑋tpos I 𝑌) = (𝑌 I 𝑋) | |
| 2 | df-ov 7419 | . 2 ⊢ (𝑌 I 𝑋) = ( I ‘〈𝑌, 𝑋〉) | |
| 3 | opex 5443 | . . 3 ⊢ 〈𝑌, 𝑋〉 ∈ V | |
| 4 | fvi 6958 | . . 3 ⊢ (〈𝑌, 𝑋〉 ∈ V → ( I ‘〈𝑌, 𝑋〉) = 〈𝑌, 𝑋〉) | |
| 5 | 3, 4 | ax-mp 5 | . 2 ⊢ ( I ‘〈𝑌, 𝑋〉) = 〈𝑌, 𝑋〉 |
| 6 | 1, 2, 5 | 3eqtri 2789 | 1 ⊢ (𝑋tpos I 𝑌) = 〈𝑌, 𝑋〉 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∈ wcel 2145 Vcvv 3453 〈cop 4593 I cid 5553 ‘cfv 6537 (class class class)co 7416 tpos ctpos 8226 |
| 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 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7739 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-mpt 5191 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-iota 6493 df-fun 6539 df-fn 6540 df-fv 6545 df-ov 7419 df-tpos 8227 |
| This theorem is used by: (None) |
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