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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 12601 | . . . 4 ⊢ 1 ∈ ℤ | |
| 2 | en2sn 9022 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 1 ∈ ℤ) → {𝐴} ≈ {1}) | |
| 3 | 1, 2 | mpan2 701 | . . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≈ {1}) |
| 4 | snfi 9024 | . . . 4 ⊢ {𝐴} ∈ Fin | |
| 5 | snfi 9024 | . . . 4 ⊢ {1} ∈ Fin | |
| 6 | hashen 14360 | . . . 4 ⊢ (({𝐴} ∈ Fin ∧ {1} ∈ Fin) → ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1})) | |
| 7 | 4, 5, 6 | mp2an 702 | . . 3 ⊢ ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1}) |
| 8 | 3, 7 | sylibr 236 | . 2 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = (♯‘{1})) |
| 9 | fzsn 13571 | . . . . 5 ⊢ (1 ∈ ℤ → (1...1) = {1}) | |
| 10 | 9 | fveq2d 6871 | . . . 4 ⊢ (1 ∈ ℤ → (♯‘(1...1)) = (♯‘{1})) |
| 11 | 1nn0 12497 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 12 | hashfz1 14359 | . . . . 5 ⊢ (1 ∈ ℕ0 → (♯‘(1...1)) = 1) | |
| 13 | 11, 12 | ax-mp 5 | . . . 4 ⊢ (♯‘(1...1)) = 1 |
| 14 | 10, 13 | eqtr3di 2812 | . . 3 ⊢ (1 ∈ ℤ → (♯‘{1}) = 1) |
| 15 | 1, 14 | ax-mp 5 | . 2 ⊢ (♯‘{1}) = 1 |
| 16 | 8, 15 | eqtrdi 2813 | 1 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = 1) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 = wceq 1560 ∈ wcel 2142 {csn 4582 class class class wbr 5100 ‘cfv 6521 (class class class)co 7396 ≈ cen 8924 Fincfn 8927 1c1 11074 ℕ0cn0 12481 ℤcz 12568 ...cfz 13512 ♯chash 14343 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5246 ax-nul 5256 ax-pow 5322 ax-pr 5390 ax-un 7718 ax-cnex 11129 ax-resscn 11130 ax-1cn 11131 ax-icn 11132 ax-addcl 11133 ax-addrcl 11134 ax-mulcl 11135 ax-mulrcl 11136 ax-mulcom 11137 ax-addass 11138 ax-mulass 11139 ax-distr 11140 ax-i2m1 11141 ax-1ne0 11142 ax-1rid 11143 ax-rnegex 11144 ax-rrecex 11145 ax-cnre 11146 ax-pre-lttri 11147 ax-pre-lttrn 11148 ax-pre-ltadd 11149 ax-pre-mulgt0 11150 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1099 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-nf 1804 df-sb 2091 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3368 df-rab 3415 df-v 3456 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4481 df-pw 4557 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-int 4906 df-iun 4951 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5542 df-eprel 5547 df-po 5555 df-so 5556 df-fr 5600 df-we 5602 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-pred 6288 df-ord 6349 df-on 6350 df-lim 6351 df-suc 6352 df-iota 6477 df-fun 6523 df-fn 6524 df-f 6525 df-f1 6526 df-fo 6527 df-f1o 6528 df-fv 6529 df-riota 7353 df-ov 7399 df-oprab 7400 df-mpo 7401 df-om 7847 df-1st 7970 df-2nd 7971 df-frecs 8262 df-wrecs 8293 df-recs 8342 df-rdg 8381 df-1o 8437 df-er 8678 df-en 8928 df-dom 8929 df-sdom 8930 df-fin 8931 df-card 9897 df-pnf 11218 df-mnf 11219 df-xr 11220 df-ltxr 11221 df-le 11222 df-sub 11416 df-neg 11417 df-nn 12211 df-n0 12482 df-z 12569 df-uz 12840 df-fz 13513 df-hash 14344 |
| This theorem is referenced by: hashen1 14383 hashrabrsn 14385 hashrabsn01 14386 hashunsng 14405 hashunsngx 14406 hashprg 14408 elprchashprn2 14409 hashdifsn 14427 hashsn01 14429 hash1snb 14432 hashmap 14448 hashfun 14450 hashbclem 14465 hashbc 14466 hashf1 14470 hash2prde 14483 hash2pwpr 14489 hashge2el2dif 14493 hash7g 14499 hash3tpexb 14507 hashdifsnp1 14519 s1len 14620 ackbijnn 15858 phicl2 16803 dfphi2 16809 vdwlem8 17024 ramcl 17065 cshwshashnsame 17139 efmnd1hash 18926 symg1hash 19430 pgp0 19636 odcau 19644 sylow2a 19659 sylow3lem6 19672 prmcyg 19934 gsumsnfd 19991 ablfac1eulem 20114 ablfac1eu 20115 pgpfaclem2 20124 prmgrpsimpgd 20156 ablsimpgprmd 20157 c0snmhm 20508 0ringdif 20573 0ring01eqbi 20578 rng1nnzr 20821 fta1glem2 26226 fta1blem 26228 fta1lem 26368 vieta1lem2 26372 vieta1 26373 vmappw 27177 umgredgnlp 29345 lfuhgr1v0e 29452 usgr1vr 29453 uvtxnm1nbgr 29602 1hevtxdg1 29704 1egrvtxdg1 29707 lfgrwlkprop 29883 rusgrnumwwlkb0 30171 clwwlknon1le1 30300 eupth2eucrct 30416 fusgreghash2wspv 30534 numclwlk1lem1 30568 ex-hash 30652 0ringsubrg 33429 drngidlhash 33617 prmidl0 33634 qsidomlem1 33636 krull 33664 qsdrng 33682 esplyfval1 33867 rlmdim 33904 lsatdim 33911 zarcmplem 34175 esumcst 34357 cntnevol 34522 coinflippv 34778 ccatmulgnn0dir 34836 ofcccat 34837 lpadlem2 34974 derang0 35516 poimirlem26 38142 poimirlem27 38143 poimirlem28 38144 frlmvscadiccat 43125 |
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