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| Mirrors > Home > MPE Home > Th. List > prhash2ex | Structured version Visualization version GIF version | ||
| Description: There is (at least) one set with two different elements: the unordered pair containing 0 and 1. In contrast to pr0hash2ex 14582, numbers are used instead of sets because their representation is shorter (and more comprehensive). (Contributed by AV, 29-Jan-2020.) |
| Ref | Expression |
|---|---|
| prhash2ex | ⊢ (♯‘{0, 1}) = 2 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0ne1 12444 | . 2 ⊢ 0 ≠ 1 | |
| 2 | c0ex 11330 | . . 3 ⊢ 0 ∈ V | |
| 3 | 1ex 11333 | . . 3 ⊢ 1 ∈ V | |
| 4 | hashprg 14569 | . . . 4 ⊢ ((0 ∈ V ∧ 1 ∈ V) → (0 ≠ 1 ↔ (♯‘{0, 1}) = 2)) | |
| 5 | 4 | bicomd 226 | . . 3 ⊢ ((0 ∈ V ∧ 1 ∈ V) → ((♯‘{0, 1}) = 2 ↔ 0 ≠ 1)) |
| 6 | 2, 3, 5 | mp2an 705 | . 2 ⊢ ((♯‘{0, 1}) = 2 ↔ 0 ≠ 1) |
| 7 | 1, 6 | mpbir 234 | 1 ⊢ (♯‘{0, 1}) = 2 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2147 ≠ wne 2959 Vcvv 3454 {cpr 4590 ‘cfv 6561 0cc0 11230 1c1 11231 2c2 12427 ♯chash 14504 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5253 ax-nul 5264 ax-pow 5332 ax-pr 5396 ax-un 7778 ax-cnex 11286 ax-resscn 11287 ax-1cn 11288 ax-icn 11289 ax-addcl 11290 ax-addrcl 11291 ax-mulcl 11292 ax-mulrcl 11293 ax-mulcom 11294 ax-addass 11295 ax-mulass 11296 ax-distr 11297 ax-i2m1 11298 ax-1ne0 11299 ax-1rid 11300 ax-rnegex 11301 ax-rrecex 11302 ax-cnre 11303 ax-pre-lttri 11304 ax-pre-lttrn 11305 ax-pre-ltadd 11306 ax-pre-mulgt0 11307 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-br 5107 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5551 df-eprel 5556 df-po 5564 df-so 5565 df-fr 5609 df-we 5611 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-pred 6325 df-ord 6386 df-on 6387 df-lim 6388 df-suc 6389 df-iota 6515 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-riota 7403 df-ov 7449 df-oprab 7450 df-mpo 7451 df-om 7905 df-1st 8028 df-2nd 8029 df-frecs 8330 df-wrecs 8361 df-recs 8410 df-rdg 8449 df-1o 8507 df-oadd 8511 df-er 8748 df-en 9005 df-dom 9006 df-sdom 9007 df-fin 9008 df-dju 10012 df-card 10050 df-pnf 11375 df-mnf 11376 df-xr 11377 df-ltxr 11378 df-le 11379 df-sub 11573 df-neg 11574 df-nn 12366 df-2 12435 df-n0 12637 df-z 12724 df-uz 12996 df-fz 13670 df-hash 14505 |
| This theorem is used by: prmreclem2 17127 mgmnsgrpex 19162 sgrpnmndex 19163 usgrexmplef 29873 umgr2v2evd2 30141 ex-hash 31087 usgrexmpl1lem 49334 usgrexmpl2lem 49339 gpgorder 49372 |
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