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| Mirrors > Home > MPE Home > Th. List > hashresfn | Structured version Visualization version GIF version | ||
| Description: Restriction of the domain of the size function. (Contributed by Thierry Arnoux, 31-Jan-2017.) |
| Ref | Expression |
|---|---|
| hashresfn | ⊢ (♯ ↾ 𝐴) Fn 𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | hashf 14289 | . . 3 ⊢ ♯:V⟶(ℕ0 ∪ {+∞}) | |
| 2 | ffn 6660 | . . 3 ⊢ (♯:V⟶(ℕ0 ∪ {+∞}) → ♯ Fn V) | |
| 3 | fnresin2 6616 | . . 3 ⊢ (♯ Fn V → (♯ ↾ (𝐴 ∩ V)) Fn (𝐴 ∩ V)) | |
| 4 | 1, 2, 3 | mp2b 10 | . 2 ⊢ (♯ ↾ (𝐴 ∩ V)) Fn (𝐴 ∩ V) |
| 5 | inv1 4339 | . . . 4 ⊢ (𝐴 ∩ V) = 𝐴 | |
| 6 | 5 | reseq2i 5933 | . . 3 ⊢ (♯ ↾ (𝐴 ∩ V)) = (♯ ↾ 𝐴) |
| 7 | fneq12 6586 | . . 3 ⊢ (((♯ ↾ (𝐴 ∩ V)) = (♯ ↾ 𝐴) ∧ (𝐴 ∩ V) = 𝐴) → ((♯ ↾ (𝐴 ∩ V)) Fn (𝐴 ∩ V) ↔ (♯ ↾ 𝐴) Fn 𝐴)) | |
| 8 | 6, 5, 7 | mp2an 693 | . 2 ⊢ ((♯ ↾ (𝐴 ∩ V)) Fn (𝐴 ∩ V) ↔ (♯ ↾ 𝐴) Fn 𝐴) |
| 9 | 4, 8 | mpbi 230 | 1 ⊢ (♯ ↾ 𝐴) Fn 𝐴 |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 = wceq 1542 Vcvv 3430 ∪ cun 3888 ∩ cin 3889 {csn 4568 ↾ cres 5624 Fn wfn 6485 ⟶wf 6486 +∞cpnf 11165 ℕ0cn0 12426 ♯chash 14281 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pow 5300 ax-pr 5368 ax-un 7680 ax-cnex 11083 ax-resscn 11084 ax-1cn 11085 ax-icn 11086 ax-addcl 11087 ax-addrcl 11088 ax-mulcl 11089 ax-mulrcl 11090 ax-mulcom 11091 ax-addass 11092 ax-mulass 11093 ax-distr 11094 ax-i2m1 11095 ax-1ne0 11096 ax-1rid 11097 ax-rnegex 11098 ax-rrecex 11099 ax-cnre 11100 ax-pre-lttri 11101 ax-pre-lttrn 11102 ax-pre-ltadd 11103 ax-pre-mulgt0 11104 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7809 df-2nd 7934 df-frecs 8222 df-wrecs 8253 df-recs 8302 df-rdg 8340 df-1o 8396 df-er 8634 df-en 8885 df-dom 8886 df-sdom 8887 df-fin 8888 df-card 9852 df-pnf 11170 df-mnf 11171 df-xr 11172 df-ltxr 11173 df-le 11174 df-sub 11368 df-neg 11369 df-nn 12164 df-n0 12427 df-xnn0 12500 df-z 12514 df-uz 12778 df-hash 14282 |
| This theorem is referenced by: hashgval2 14329 coinfliplem 34644 coinflipspace 34646 |
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