| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > old1 | Structured version Visualization version GIF version | ||
| Description: The only surreal older than 1o is 0s. (Contributed by Scott Fenton, 4-Feb-2025.) |
| Ref | Expression |
|---|---|
| old1 | ⊢ ( O ‘1o) = { 0s } |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1on 8518 | . . 3 ⊢ 1o ∈ On | |
| 2 | oldval 27893 | . . 3 ⊢ (1o ∈ On → ( O ‘1o) = ∪ ( M “ 1o)) | |
| 3 | 1, 2 | ax-mp 5 | . 2 ⊢ ( O ‘1o) = ∪ ( M “ 1o) |
| 4 | df1o2 8513 | . . . . . 6 ⊢ 1o = {∅} | |
| 5 | 4 | imaeq2i 6076 | . . . . 5 ⊢ ( M “ 1o) = ( M “ {∅}) |
| 6 | madef 27895 | . . . . . . 7 ⊢ M :On⟶𝒫 No | |
| 7 | ffn 6736 | . . . . . . 7 ⊢ ( M :On⟶𝒫 No → M Fn On) | |
| 8 | 6, 7 | ax-mp 5 | . . . . . 6 ⊢ M Fn On |
| 9 | 0elon 6438 | . . . . . 6 ⊢ ∅ ∈ On | |
| 10 | fnsnfv 6988 | . . . . . 6 ⊢ (( M Fn On ∧ ∅ ∈ On) → {( M ‘∅)} = ( M “ {∅})) | |
| 11 | 8, 9, 10 | mp2an 692 | . . . . 5 ⊢ {( M ‘∅)} = ( M “ {∅}) |
| 12 | 5, 11 | eqtr4i 2768 | . . . 4 ⊢ ( M “ 1o) = {( M ‘∅)} |
| 13 | 12 | unieqi 4919 | . . 3 ⊢ ∪ ( M “ 1o) = ∪ {( M ‘∅)} |
| 14 | fvex 6919 | . . . . 5 ⊢ ( M ‘∅) ∈ V | |
| 15 | 14 | unisn 4926 | . . . 4 ⊢ ∪ {( M ‘∅)} = ( M ‘∅) |
| 16 | made0 27912 | . . . 4 ⊢ ( M ‘∅) = { 0s } | |
| 17 | 15, 16 | eqtri 2765 | . . 3 ⊢ ∪ {( M ‘∅)} = { 0s } |
| 18 | 13, 17 | eqtri 2765 | . 2 ⊢ ∪ ( M “ 1o) = { 0s } |
| 19 | 3, 18 | eqtri 2765 | 1 ⊢ ( O ‘1o) = { 0s } |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1540 ∈ wcel 2108 ∅c0 4333 𝒫 cpw 4600 {csn 4626 ∪ cuni 4907 “ cima 5688 Oncon0 6384 Fn wfn 6556 ⟶wf 6557 ‘cfv 6561 1oc1o 8499 No csur 27684 0s c0s 27867 M cmade 27881 O cold 27882 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2708 ax-rep 5279 ax-sep 5296 ax-nul 5306 ax-pow 5365 ax-pr 5432 ax-un 7755 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2892 df-ne 2941 df-ral 3062 df-rex 3071 df-rmo 3380 df-reu 3381 df-rab 3437 df-v 3482 df-sbc 3789 df-csb 3900 df-dif 3954 df-un 3956 df-in 3958 df-ss 3968 df-pss 3971 df-nul 4334 df-if 4526 df-pw 4602 df-sn 4627 df-pr 4629 df-tp 4631 df-op 4633 df-uni 4908 df-int 4947 df-iun 4993 df-br 5144 df-opab 5206 df-mpt 5226 df-tr 5260 df-id 5578 df-eprel 5584 df-po 5592 df-so 5593 df-fr 5637 df-we 5639 df-xp 5691 df-rel 5692 df-cnv 5693 df-co 5694 df-dm 5695 df-rn 5696 df-res 5697 df-ima 5698 df-pred 6321 df-ord 6387 df-on 6388 df-suc 6390 df-iota 6514 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 df-2nd 8015 df-frecs 8306 df-wrecs 8337 df-recs 8411 df-1o 8506 df-2o 8507 df-no 27687 df-slt 27688 df-bday 27689 df-sslt 27826 df-scut 27828 df-0s 27869 df-made 27886 df-old 27887 |
| This theorem is referenced by: left1s 27933 right1s 27934 |
| Copyright terms: Public domain | W3C validator |