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| Mirrors > Home > MPE Home > Th. List > neg0s | Structured version Visualization version GIF version | ||
| Description: Negative surreal zero is surreal zero. (Contributed by Scott Fenton, 20-Aug-2024.) |
| Ref | Expression |
|---|---|
| neg0s | ⊢ ( -us ‘ 0s ) = 0s |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | right0s 28124 | . . . . 5 ⊢ ( R ‘ 0s ) = ∅ | |
| 2 | 1 | imaeq2i 6065 | . . . 4 ⊢ ( -us “ ( R ‘ 0s )) = ( -us “ ∅) |
| 3 | ima0 6084 | . . . 4 ⊢ ( -us “ ∅) = ∅ | |
| 4 | 2, 3 | eqtri 2789 | . . 3 ⊢ ( -us “ ( R ‘ 0s )) = ∅ |
| 5 | left0s 28123 | . . . . 5 ⊢ ( L ‘ 0s ) = ∅ | |
| 6 | 5 | imaeq2i 6065 | . . . 4 ⊢ ( -us “ ( L ‘ 0s )) = ( -us “ ∅) |
| 7 | 6, 3 | eqtri 2789 | . . 3 ⊢ ( -us “ ( L ‘ 0s )) = ∅ |
| 8 | 4, 7 | oveq12i 7435 | . 2 ⊢ (( -us “ ( R ‘ 0s )) |s ( -us “ ( L ‘ 0s ))) = (∅ |s ∅) |
| 9 | 0no 28039 | . . 3 ⊢ 0s ∈ No | |
| 10 | negsval 28255 | . . 3 ⊢ ( 0s ∈ No → ( -us ‘ 0s ) = (( -us “ ( R ‘ 0s )) |s ( -us “ ( L ‘ 0s )))) | |
| 11 | 9, 10 | ax-mp 5 | . 2 ⊢ ( -us ‘ 0s ) = (( -us “ ( R ‘ 0s )) |s ( -us “ ( L ‘ 0s ))) |
| 12 | df-0s 28037 | . 2 ⊢ 0s = (∅ |s ∅) | |
| 13 | 8, 11, 12 | 3eqtr4i 2799 | 1 ⊢ ( -us ‘ 0s ) = 0s |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∈ wcel 2146 ∅c0 4289 “ cima 5669 ‘cfv 6543 (class class class)co 7423 No csur 27841 |s ccuts 27989 0s c0s 28035 L cleft 28055 R cright 28056 -us cnegs 28249 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-rep 5243 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 |
| 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 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-ral 3083 df-rex 3093 df-rmo 3372 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-pss 3928 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-tp 4599 df-op 4601 df-uni 4878 df-int 4918 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5561 df-eprel 5566 df-po 5574 df-so 5575 df-fr 5619 df-se 5620 df-we 5621 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-pred 6309 df-ord 6370 df-on 6371 df-suc 6373 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7380 df-ov 7426 df-oprab 7427 df-mpo 7428 df-2nd 7996 df-frecs 8287 df-wrecs 8318 df-recs 8367 df-1o 8462 df-2o 8463 df-no 27844 df-lts 27845 df-bday 27846 df-slts 27988 df-cuts 27990 df-0s 28037 df-made 28057 df-old 28058 df-left 28060 df-right 28061 df-norec 28168 df-negs 28251 |
| This theorem is used by: neg1s 28257 lt0negs2d 28281 subsfo 28295 subsid1 28298 ltmulnegs1d 28406 mulscan2d 28409 recsex 28449 abssnid 28473 absmuls 28474 abssge0 28475 absnegs 28477 leabss 28478 elzs2 28629 elnnzs 28631 elznns 28632 z12bday 28715 bdayfin 28717 recut 28724 |
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