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| Mirrors > Home > MPE Home > Th. List > ex-hash | Structured version Visualization version GIF version | ||
| Description: Example for df-hash 14302. (Contributed by AV, 4-Sep-2021.) |
| Ref | Expression |
|---|---|
| ex-hash | ⊢ (♯‘{0, 1, 2}) = 3 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-tp 4596 | . . . 4 ⊢ {0, 1, 2} = ({0, 1} ∪ {2}) | |
| 2 | 1 | fveq2i 6863 | . . 3 ⊢ (♯‘{0, 1, 2}) = (♯‘({0, 1} ∪ {2})) |
| 3 | prfi 9280 | . . . 4 ⊢ {0, 1} ∈ Fin | |
| 4 | snfi 9016 | . . . 4 ⊢ {2} ∈ Fin | |
| 5 | 2ne0 12291 | . . . . . 6 ⊢ 2 ≠ 0 | |
| 6 | 1ne2 12395 | . . . . . . 7 ⊢ 1 ≠ 2 | |
| 7 | 6 | necomi 2980 | . . . . . 6 ⊢ 2 ≠ 1 |
| 8 | 5, 7 | nelpri 4621 | . . . . 5 ⊢ ¬ 2 ∈ {0, 1} |
| 9 | disjsn 4677 | . . . . 5 ⊢ (({0, 1} ∩ {2}) = ∅ ↔ ¬ 2 ∈ {0, 1}) | |
| 10 | 8, 9 | mpbir 231 | . . . 4 ⊢ ({0, 1} ∩ {2}) = ∅ |
| 11 | hashun 14353 | . . . 4 ⊢ (({0, 1} ∈ Fin ∧ {2} ∈ Fin ∧ ({0, 1} ∩ {2}) = ∅) → (♯‘({0, 1} ∪ {2})) = ((♯‘{0, 1}) + (♯‘{2}))) | |
| 12 | 3, 4, 10, 11 | mp3an 1463 | . . 3 ⊢ (♯‘({0, 1} ∪ {2})) = ((♯‘{0, 1}) + (♯‘{2})) |
| 13 | 2, 12 | eqtri 2753 | . 2 ⊢ (♯‘{0, 1, 2}) = ((♯‘{0, 1}) + (♯‘{2})) |
| 14 | prhash2ex 14370 | . . . 4 ⊢ (♯‘{0, 1}) = 2 | |
| 15 | 2z 12571 | . . . . 5 ⊢ 2 ∈ ℤ | |
| 16 | hashsng 14340 | . . . . 5 ⊢ (2 ∈ ℤ → (♯‘{2}) = 1) | |
| 17 | 15, 16 | ax-mp 5 | . . . 4 ⊢ (♯‘{2}) = 1 |
| 18 | 14, 17 | oveq12i 7401 | . . 3 ⊢ ((♯‘{0, 1}) + (♯‘{2})) = (2 + 1) |
| 19 | 2p1e3 12329 | . . 3 ⊢ (2 + 1) = 3 | |
| 20 | 18, 19 | eqtri 2753 | . 2 ⊢ ((♯‘{0, 1}) + (♯‘{2})) = 3 |
| 21 | 13, 20 | eqtri 2753 | 1 ⊢ (♯‘{0, 1, 2}) = 3 |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 = wceq 1540 ∈ wcel 2109 ∪ cun 3914 ∩ cin 3915 ∅c0 4298 {csn 4591 {cpr 4593 {ctp 4595 ‘cfv 6513 (class class class)co 7389 Fincfn 8920 0cc0 11074 1c1 11075 + caddc 11077 2c2 12242 3c3 12243 ℤcz 12535 ♯chash 14301 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-sep 5253 ax-nul 5263 ax-pow 5322 ax-pr 5389 ax-un 7713 ax-cnex 11130 ax-resscn 11131 ax-1cn 11132 ax-icn 11133 ax-addcl 11134 ax-addrcl 11135 ax-mulcl 11136 ax-mulrcl 11137 ax-mulcom 11138 ax-addass 11139 ax-mulass 11140 ax-distr 11141 ax-i2m1 11142 ax-1ne0 11143 ax-1rid 11144 ax-rnegex 11145 ax-rrecex 11146 ax-cnre 11147 ax-pre-lttri 11148 ax-pre-lttrn 11149 ax-pre-ltadd 11150 ax-pre-mulgt0 11151 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-nel 3031 df-ral 3046 df-rex 3055 df-reu 3357 df-rab 3409 df-v 3452 df-sbc 3756 df-csb 3865 df-dif 3919 df-un 3921 df-in 3923 df-ss 3933 df-pss 3936 df-nul 4299 df-if 4491 df-pw 4567 df-sn 4592 df-pr 4594 df-tp 4596 df-op 4598 df-uni 4874 df-int 4913 df-iun 4959 df-br 5110 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5535 df-eprel 5540 df-po 5548 df-so 5549 df-fr 5593 df-we 5595 df-xp 5646 df-rel 5647 df-cnv 5648 df-co 5649 df-dm 5650 df-rn 5651 df-res 5652 df-ima 5653 df-pred 6276 df-ord 6337 df-on 6338 df-lim 6339 df-suc 6340 df-iota 6466 df-fun 6515 df-fn 6516 df-f 6517 df-f1 6518 df-fo 6519 df-f1o 6520 df-fv 6521 df-riota 7346 df-ov 7392 df-oprab 7393 df-mpo 7394 df-om 7845 df-1st 7970 df-2nd 7971 df-frecs 8262 df-wrecs 8293 df-recs 8342 df-rdg 8380 df-1o 8436 df-2o 8437 df-oadd 8440 df-er 8673 df-en 8921 df-dom 8922 df-sdom 8923 df-fin 8924 df-dju 9860 df-card 9898 df-pnf 11216 df-mnf 11217 df-xr 11218 df-ltxr 11219 df-le 11220 df-sub 11413 df-neg 11414 df-nn 12188 df-2 12250 df-3 12251 df-n0 12449 df-z 12536 df-uz 12800 df-fz 13475 df-hash 14302 |
| This theorem is referenced by: usgrexmpl1tri 48006 |
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