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| Mirrors > Home > MPE Home > Th. List > hashsng | Structured version Visualization version GIF version | ||
| Description: The size of a singleton. (Contributed by Paul Chapman, 26-Oct-2012.) (Proof shortened by Mario Carneiro, 13-Feb-2013.) |
| Ref | Expression |
|---|---|
| hashsng | ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = 1) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1z 12719 | . . . 4 ⊢ 1 ∈ ℤ | |
| 2 | en2sn 9062 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 1 ∈ ℤ) → {𝐴} ≈ {1}) | |
| 3 | 1, 2 | mpan2 704 | . . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≈ {1}) |
| 4 | snfi 9064 | . . . 4 ⊢ {𝐴} ∈ Fin | |
| 5 | snfi 9064 | . . . 4 ⊢ {1} ∈ Fin | |
| 6 | hashen 14484 | . . . 4 ⊢ (({𝐴} ∈ Fin ∧ {1} ∈ Fin) → ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1})) | |
| 7 | 4, 5, 6 | mp2an 705 | . . 3 ⊢ ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1}) |
| 8 | 3, 7 | sylibr 237 | . 2 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = (♯‘{1})) |
| 9 | fzsn 13693 | . . . . 5 ⊢ (1 ∈ ℤ → (1...1) = {1}) | |
| 10 | 9 | fveq2d 6887 | . . . 4 ⊢ (1 ∈ ℤ → (♯‘(1...1)) = (♯‘{1})) |
| 11 | 1nn0 12615 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 12 | hashfz1 14483 | . . . . 5 ⊢ (1 ∈ ℕ0 → (♯‘(1...1)) = 1) | |
| 13 | 11, 12 | ax-mp 5 | . . . 4 ⊢ (♯‘(1...1)) = 1 |
| 14 | 10, 13 | eqtr3di 2811 | . . 3 ⊢ (1 ∈ ℤ → (♯‘{1}) = 1) |
| 15 | 1, 14 | ax-mp 5 | . 2 ⊢ (♯‘{1}) = 1 |
| 16 | 8, 15 | eqtrdi 2812 | 1 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = 1) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2145 {csn 4584 class class class wbr 5103 ‘cfv 6537 (class class class)co 7418 ≈ cen 8963 Fincfn 8966 1c1 11194 ℕ0cn0 12599 ℤcz 12686 ...cfz 13632 ♯chash 14467 |
| 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-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7749 ax-cnex 11249 ax-resscn 11250 ax-1cn 11251 ax-icn 11252 ax-addcl 11253 ax-addrcl 11254 ax-mulcl 11255 ax-mulrcl 11256 ax-mulcom 11257 ax-addass 11258 ax-mulass 11259 ax-distr 11260 ax-i2m1 11261 ax-1ne0 11262 ax-1rid 11263 ax-rnegex 11264 ax-rrecex 11265 ax-cnre 11266 ax-pre-lttri 11267 ax-pre-lttrn 11268 ax-pre-ltadd 11269 ax-pre-mulgt0 11270 |
| 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-nel 3063 df-ral 3078 df-rex 3088 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-op 4591 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-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 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7375 df-ov 7421 df-oprab 7422 df-mpo 7423 df-om 7876 df-1st 7999 df-2nd 8000 df-frecs 8292 df-wrecs 8323 df-recs 8372 df-rdg 8411 df-1o 8469 df-er 8710 df-en 8967 df-dom 8968 df-sdom 8969 df-fin 8970 df-card 10013 df-pnf 11338 df-mnf 11339 df-xr 11340 df-ltxr 11341 df-le 11342 df-sub 11536 df-neg 11537 df-nn 12329 df-n0 12600 df-z 12687 df-uz 12959 df-fz 13633 df-hash 14468 |
| This theorem is used by: hashen1 14507 hashrabrsn 14509 hashrabsn01 14510 hashunsng 14529 hashunsngx 14530 hashprg 14532 elprchashprn2 14533 hashdifsn 14552 hashsn01 14554 hash1snb 14557 hashmap 14573 hashfun 14575 hashbclem 14590 hashbc 14591 hashf1 14595 hash2prde 14608 hash2pwpr 14614 hashge2el2dif 14618 hash7g 14624 hash3tpexb 14632 hashdifsnp1 14644 s1len 14746 ackbijnn 15990 phicl2 16938 dfphi2 16944 vdwlem8 17159 ramcl 17200 cshwshashnsame 17274 efmnd1hash 19081 symg1hash 19597 pgp0 19803 odcau 19811 sylow2a 19826 sylow3lem6 19839 prmcyg 20101 gsumsnfd 20158 ablfac1eulem 20281 ablfac1eu 20282 pgpfaclem2 20291 prmgrpsimpgd 20323 ablsimpgprmd 20324 c0snmhm 20686 0ringdif 20771 0ring01eqbi2 20776 0ring01eqbi 20777 rng1nnzr 21026 prmidl0 21627 qsidomlem1 21629 fta1glem2 26480 fta1blem 26482 fta1lem 26621 vieta1lem2 26627 vieta1 26628 vmappw 27436 umgredgnlp 29718 lfuhgr1v0e 29828 usgr1vr 29829 uvtxnm1nbgr 29978 1hevtxdg1 30080 1egrvtxdg1 30083 lfgrwlkprop 30263 rusgrnumwwlkb0 30556 clwwlknon1le1 30685 eupth2eucrct 30811 fusgreghash2wspv 30929 numclwlk1lem1 30963 ex-hash 31047 0ringsubrg 33805 drngidlhash 33976 krull 33996 qsdrng 34014 esplyfval1 34198 rlmdim 34235 lsatdim 34242 zarcmplem 34506 esumcst 34688 cntnevol 34854 coinflippv 35109 ccatmulgnn0dir 35167 ofcccat 35168 lpadlem2 35305 derang0 35913 poimirlem26 38544 poimirlem27 38545 poimirlem28 38546 frlmvscadiccat 43553 |
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