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| Mirrors > Home > ILE Home > Th. List > pwssnf1o | GIF version | ||
| Description: Triviality of singleton powers: set equipollence. (Contributed by Stefan O'Rear, 24-Jan-2015.) |
| Ref | Expression |
|---|---|
| pwssnf1o.y | ⊢ 𝑌 = (𝑅 ↑s {𝐼}) |
| pwssnf1o.b | ⊢ 𝐵 = (Base‘𝑅) |
| pwssnf1o.f | ⊢ 𝐹 = (𝑥 ∈ 𝐵 ↦ ({𝐼} × {𝑥})) |
| pwssnf1o.c | ⊢ 𝐶 = (Base‘𝑌) |
| Ref | Expression |
|---|---|
| pwssnf1o | ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → 𝐹:𝐵–1-1-onto→𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pwssnf1o.b | . . . 4 ⊢ 𝐵 = (Base‘𝑅) | |
| 2 | basfn 13005 | . . . . 5 ⊢ Base Fn V | |
| 3 | elex 2788 | . . . . . 6 ⊢ (𝑅 ∈ 𝑉 → 𝑅 ∈ V) | |
| 4 | 3 | adantr 276 | . . . . 5 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → 𝑅 ∈ V) |
| 5 | funfvex 5616 | . . . . . 6 ⊢ ((Fun Base ∧ 𝑅 ∈ dom Base) → (Base‘𝑅) ∈ V) | |
| 6 | 5 | funfni 5395 | . . . . 5 ⊢ ((Base Fn V ∧ 𝑅 ∈ V) → (Base‘𝑅) ∈ V) |
| 7 | 2, 4, 6 | sylancr 414 | . . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → (Base‘𝑅) ∈ V) |
| 8 | 1, 7 | eqeltrid 2294 | . . 3 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → 𝐵 ∈ V) |
| 9 | pwssnf1o.f | . . . 4 ⊢ 𝐹 = (𝑥 ∈ 𝐵 ↦ ({𝐼} × {𝑥})) | |
| 10 | 9 | mapsnf1o 6847 | . . 3 ⊢ ((𝐵 ∈ V ∧ 𝐼 ∈ 𝑊) → 𝐹:𝐵–1-1-onto→(𝐵 ↑𝑚 {𝐼})) |
| 11 | 8, 10 | sylancom 420 | . 2 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → 𝐹:𝐵–1-1-onto→(𝐵 ↑𝑚 {𝐼})) |
| 12 | pwssnf1o.c | . . . 4 ⊢ 𝐶 = (Base‘𝑌) | |
| 13 | snexg 4244 | . . . . 5 ⊢ (𝐼 ∈ 𝑊 → {𝐼} ∈ V) | |
| 14 | pwssnf1o.y | . . . . . 6 ⊢ 𝑌 = (𝑅 ↑s {𝐼}) | |
| 15 | 14, 1 | pwsbas 13239 | . . . . 5 ⊢ ((𝑅 ∈ 𝑉 ∧ {𝐼} ∈ V) → (𝐵 ↑𝑚 {𝐼}) = (Base‘𝑌)) |
| 16 | 13, 15 | sylan2 286 | . . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → (𝐵 ↑𝑚 {𝐼}) = (Base‘𝑌)) |
| 17 | 12, 16 | eqtr4id 2259 | . . 3 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → 𝐶 = (𝐵 ↑𝑚 {𝐼})) |
| 18 | 17 | f1oeq3d 5541 | . 2 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → (𝐹:𝐵–1-1-onto→𝐶 ↔ 𝐹:𝐵–1-1-onto→(𝐵 ↑𝑚 {𝐼}))) |
| 19 | 11, 18 | mpbird 167 | 1 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐼 ∈ 𝑊) → 𝐹:𝐵–1-1-onto→𝐶) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1373 ∈ wcel 2178 Vcvv 2776 {csn 3643 ↦ cmpt 4121 × cxp 4691 Fn wfn 5285 –1-1-onto→wf1o 5289 ‘cfv 5290 (class class class)co 5967 ↑𝑚 cmap 6758 Basecbs 12947 ↑s cpws 13213 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2180 ax-14 2181 ax-ext 2189 ax-coll 4175 ax-sep 4178 ax-pow 4234 ax-pr 4269 ax-un 4498 ax-setind 4603 ax-cnex 8051 ax-resscn 8052 ax-1cn 8053 ax-1re 8054 ax-icn 8055 ax-addcl 8056 ax-addrcl 8057 ax-mulcl 8058 ax-addcom 8060 ax-mulcom 8061 ax-addass 8062 ax-mulass 8063 ax-distr 8064 ax-i2m1 8065 ax-0lt1 8066 ax-1rid 8067 ax-0id 8068 ax-rnegex 8069 ax-cnre 8071 ax-pre-ltirr 8072 ax-pre-ltwlin 8073 ax-pre-lttrn 8074 ax-pre-apti 8075 ax-pre-ltadd 8076 |
| This theorem depends on definitions: df-bi 117 df-3or 982 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-ne 2379 df-nel 2474 df-ral 2491 df-rex 2492 df-reu 2493 df-rab 2495 df-v 2778 df-sbc 3006 df-csb 3102 df-dif 3176 df-un 3178 df-in 3180 df-ss 3187 df-nul 3469 df-pw 3628 df-sn 3649 df-pr 3650 df-tp 3651 df-op 3652 df-uni 3865 df-int 3900 df-iun 3943 df-br 4060 df-opab 4122 df-mpt 4123 df-id 4358 df-xp 4699 df-rel 4700 df-cnv 4701 df-co 4702 df-dm 4703 df-rn 4704 df-res 4705 df-ima 4706 df-iota 5251 df-fun 5292 df-fn 5293 df-f 5294 df-f1 5295 df-fo 5296 df-f1o 5297 df-fv 5298 df-riota 5922 df-ov 5970 df-oprab 5971 df-mpo 5972 df-1st 6249 df-2nd 6250 df-map 6760 df-ixp 6809 df-sup 7112 df-pnf 8144 df-mnf 8145 df-xr 8146 df-ltxr 8147 df-le 8148 df-sub 8280 df-neg 8281 df-inn 9072 df-2 9130 df-3 9131 df-4 9132 df-5 9133 df-6 9134 df-7 9135 df-8 9136 df-9 9137 df-n0 9331 df-z 9408 df-dec 9540 df-uz 9684 df-fz 10166 df-struct 12949 df-ndx 12950 df-slot 12951 df-base 12953 df-plusg 13037 df-mulr 13038 df-sca 13040 df-vsca 13041 df-ip 13042 df-tset 13043 df-ple 13044 df-ds 13046 df-hom 13048 df-cco 13049 df-rest 13188 df-topn 13189 df-topgen 13207 df-pt 13208 df-prds 13214 df-pws 13237 |
| This theorem is referenced by: (None) |
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