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| Mirrors > Home > MPE Home > Th. List > negsf1o | Structured version Visualization version GIF version | ||
| Description: Surreal negation is a bijection. (Contributed by Scott Fenton, 3-Feb-2025.) |
| Ref | Expression |
|---|---|
| negsf1o | ⊢ -us : No –1-1-onto→ No |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | negsf 28420 | . . 3 ⊢ -us : No ⟶ No | |
| 2 | negs11 28417 | . . . . 5 ⊢ ((𝑥 ∈ No ∧ 𝑦 ∈ No ) → (( -us ‘𝑥) = ( -us ‘𝑦) ↔ 𝑥 = 𝑦)) | |
| 3 | 2 | biimpd 232 | . . . 4 ⊢ ((𝑥 ∈ No ∧ 𝑦 ∈ No ) → (( -us ‘𝑥) = ( -us ‘𝑦) → 𝑥 = 𝑦)) |
| 4 | 3 | rgen2 3203 | . . 3 ⊢ ∀𝑥 ∈ No ∀𝑦 ∈ No (( -us ‘𝑥) = ( -us ‘𝑦) → 𝑥 = 𝑦) |
| 5 | dff13 7250 | . . 3 ⊢ ( -us : No –1-1→ No ↔ ( -us : No ⟶ No ∧ ∀𝑥 ∈ No ∀𝑦 ∈ No (( -us ‘𝑥) = ( -us ‘𝑦) → 𝑥 = 𝑦))) | |
| 6 | 1, 4, 5 | mpbir2an 724 | . 2 ⊢ -us : No –1-1→ No |
| 7 | negsfo 28421 | . 2 ⊢ -us : No –onto→ No | |
| 8 | df-f1o 6538 | . 2 ⊢ ( -us : No –1-1-onto→ No ↔ ( -us : No –1-1→ No ∧ -us : No –onto→ No )) | |
| 9 | 6, 7, 8 | mpbir2an 724 | 1 ⊢ -us : No –1-1-onto→ No |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∀wral 3077 ⟶wf 6527 –1-1→wf1 6528 –onto→wfo 6529 –1-1-onto→wf1o 6530 ‘cfv 6531 No csur 27979 -us cnegs 28387 |
| 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 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-ot 4593 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-se 5605 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6297 df-ord 6358 df-on 6359 df-suc 6361 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-1st 7990 df-2nd 7991 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-1o 8460 df-2o 8461 df-nadd 8659 df-no 27982 df-lts 27983 df-bday 27984 df-les 28084 df-slts 28126 df-cuts 28128 df-0s 28175 df-made 28195 df-old 28196 df-left 28198 df-right 28199 df-norec 28306 df-norec2 28317 df-adds 28328 df-negs 28389 |
| This theorem is used by: (None) |
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