| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 12623 | . . . 4 ⊢ 1 ∈ ℤ | |
| 2 | en2sn 9037 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 1 ∈ ℤ) → {𝐴} ≈ {1}) | |
| 3 | 1, 2 | mpan2 703 | . . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≈ {1}) |
| 4 | snfi 9039 | . . . 4 ⊢ {𝐴} ∈ Fin | |
| 5 | snfi 9039 | . . . 4 ⊢ {1} ∈ Fin | |
| 6 | hashen 14382 | . . . 4 ⊢ (({𝐴} ∈ Fin ∧ {1} ∈ Fin) → ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1})) | |
| 7 | 4, 5, 6 | mp2an 704 | . . 3 ⊢ ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1}) |
| 8 | 3, 7 | sylibr 237 | . 2 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = (♯‘{1})) |
| 9 | fzsn 13593 | . . . . 5 ⊢ (1 ∈ ℤ → (1...1) = {1}) | |
| 10 | 9 | fveq2d 6886 | . . . 4 ⊢ (1 ∈ ℤ → (♯‘(1...1)) = (♯‘{1})) |
| 11 | 1nn0 12519 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 12 | hashfz1 14381 | . . . . 5 ⊢ (1 ∈ ℕ0 → (♯‘(1...1)) = 1) | |
| 13 | 11, 12 | ax-mp 5 | . . . 4 ⊢ (♯‘(1...1)) = 1 |
| 14 | 10, 13 | eqtr3di 2819 | . . 3 ⊢ (1 ∈ ℤ → (♯‘{1}) = 1) |
| 15 | 1, 14 | ax-mp 5 | . 2 ⊢ (♯‘{1}) = 1 |
| 16 | 8, 15 | eqtrdi 2820 | 1 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = 1) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 = wceq 1567 ∈ wcel 2149 {csn 4594 class class class wbr 5113 ‘cfv 6537 (class class class)co 7411 ≈ cen 8939 Fincfn 8942 1c1 11100 ℕ0cn0 12503 ℤcz 12590 ...cfz 13534 ♯chash 14365 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-cnex 11155 ax-resscn 11156 ax-1cn 11157 ax-icn 11158 ax-addcl 11159 ax-addrcl 11160 ax-mulcl 11161 ax-mulrcl 11162 ax-mulcom 11163 ax-addass 11164 ax-mulass 11165 ax-distr 11166 ax-i2m1 11167 ax-1ne0 11168 ax-1rid 11169 ax-rnegex 11170 ax-rrecex 11171 ax-cnre 11172 ax-pre-lttri 11173 ax-pre-lttrn 11174 ax-pre-ltadd 11175 ax-pre-mulgt0 11176 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-int 4917 df-iun 4962 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5557 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-we 5617 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 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 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7862 df-1st 7985 df-2nd 7986 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-1o 8452 df-er 8693 df-en 8943 df-dom 8944 df-sdom 8945 df-fin 8946 df-card 9924 df-pnf 11244 df-mnf 11245 df-xr 11246 df-ltxr 11247 df-le 11248 df-sub 11442 df-neg 11443 df-nn 12233 df-n0 12504 df-z 12591 df-uz 12862 df-fz 13535 df-hash 14366 |
| This theorem is referenced by: hashen1 14405 hashrabrsn 14407 hashrabsn01 14408 hashunsng 14427 hashunsngx 14428 hashprg 14430 elprchashprn2 14431 hashdifsn 14450 hashsn01 14452 hash1snb 14455 hashmap 14471 hashfun 14473 hashbclem 14488 hashbc 14489 hashf1 14493 hash2prde 14506 hash2pwpr 14512 hashge2el2dif 14516 hash7g 14522 hash3tpexb 14530 hashdifsnp1 14542 s1len 14643 ackbijnn 15881 phicl2 16826 dfphi2 16832 vdwlem8 17047 ramcl 17088 cshwshashnsame 17162 efmnd1hash 18950 symg1hash 19459 pgp0 19665 odcau 19673 sylow2a 19688 sylow3lem6 19701 prmcyg 19963 gsumsnfd 20020 ablfac1eulem 20143 ablfac1eu 20144 pgpfaclem2 20153 prmgrpsimpgd 20185 ablsimpgprmd 20186 c0snmhm 20544 0ringdif 20610 0ring01eqbi2 20615 0ring01eqbi 20616 rng1nnzr 20856 prmidl0 21446 qsidomlem1 21448 fta1glem2 26294 fta1blem 26296 fta1lem 26436 vieta1lem2 26440 vieta1 26441 vmappw 27245 umgredgnlp 29437 lfuhgr1v0e 29544 usgr1vr 29545 uvtxnm1nbgr 29694 1hevtxdg1 29796 1egrvtxdg1 29799 lfgrwlkprop 29975 rusgrnumwwlkb0 30263 clwwlknon1le1 30392 eupth2eucrct 30508 fusgreghash2wspv 30626 numclwlk1lem1 30660 ex-hash 30744 0ringsubrg 33511 drngidlhash 33685 krull 33705 qsdrng 33723 esplyfval1 33907 rlmdim 33944 lsatdim 33951 zarcmplem 34215 esumcst 34397 cntnevol 34562 coinflippv 34818 ccatmulgnn0dir 34876 ofcccat 34877 lpadlem2 35014 derang0 35559 poimirlem26 38184 poimirlem27 38185 poimirlem28 38186 frlmvscadiccat 43169 |
| Copyright terms: Public domain | W3C validator |