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| Mirrors > Home > MPE Home > Th. List > odhash | Structured version Visualization version GIF version | ||
| Description: An element of zero order generates an infinite subgroup. (Contributed by Stefan O'Rear, 12-Sep-2015.) |
| Ref | Expression |
|---|---|
| odhash.x | ⊢ 𝑋 = (Base‘𝐺) |
| odhash.o | ⊢ 𝑂 = (od‘𝐺) |
| odhash.k | ⊢ 𝐾 = (mrCls‘(SubGrp‘𝐺)) |
| Ref | Expression |
|---|---|
| odhash | ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ (𝑂‘𝐴) = 0) → (♯‘(𝐾‘{𝐴})) = +∞) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | odhash.x | . . . 4 ⊢ 𝑋 = (Base‘𝐺) | |
| 2 | eqid 2760 | . . . 4 ⊢ (.g‘𝐺) = (.g‘𝐺) | |
| 3 | odhash.o | . . . 4 ⊢ 𝑂 = (od‘𝐺) | |
| 4 | odhash.k | . . . 4 ⊢ 𝐾 = (mrCls‘(SubGrp‘𝐺)) | |
| 5 | 1, 2, 3, 4 | odf1o1 19725 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ (𝑂‘𝐴) = 0) → (𝑥 ∈ ℤ ↦ (𝑥(.g‘𝐺)𝐴)):ℤ–1-1-onto→(𝐾‘{𝐴})) |
| 6 | zex 12649 | . . . 4 ⊢ ℤ ∈ V | |
| 7 | 6 | f1oen 8985 | . . 3 ⊢ ((𝑥 ∈ ℤ ↦ (𝑥(.g‘𝐺)𝐴)):ℤ–1-1-onto→(𝐾‘{𝐴}) → ℤ ≈ (𝐾‘{𝐴})) |
| 8 | hasheni 14437 | . . 3 ⊢ (ℤ ≈ (𝐾‘{𝐴}) → (♯‘ℤ) = (♯‘(𝐾‘{𝐴}))) | |
| 9 | 5, 7, 8 | 3syl 19 | . 2 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ (𝑂‘𝐴) = 0) → (♯‘ℤ) = (♯‘(𝐾‘{𝐴}))) |
| 10 | ominf 9241 | . . . 4 ⊢ ¬ ω ∈ Fin | |
| 11 | znnen 16325 | . . . . . 6 ⊢ ℤ ≈ ℕ | |
| 12 | nnenom 14069 | . . . . . 6 ⊢ ℕ ≈ ω | |
| 13 | 11, 12 | entri 9021 | . . . . 5 ⊢ ℤ ≈ ω |
| 14 | enfi 9188 | . . . . 5 ⊢ (ℤ ≈ ω → (ℤ ∈ Fin ↔ ω ∈ Fin)) | |
| 15 | 13, 14 | ax-mp 5 | . . . 4 ⊢ (ℤ ∈ Fin ↔ ω ∈ Fin) |
| 16 | 10, 15 | mtbir 326 | . . 3 ⊢ ¬ ℤ ∈ Fin |
| 17 | hashinf 14424 | . . 3 ⊢ ((ℤ ∈ V ∧ ¬ ℤ ∈ Fin) → (♯‘ℤ) = +∞) | |
| 18 | 6, 16, 17 | mp2an 705 | . 2 ⊢ (♯‘ℤ) = +∞ |
| 19 | 9, 18 | eqtr3di 2810 | 1 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ (𝑂‘𝐴) = 0) → (♯‘(𝐾‘{𝐴})) = +∞) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ w3a 1103 = wceq 1570 ∈ wcel 2145 Vcvv 3450 {csn 4584 class class class wbr 5103 ↦ cmpt 5186 –1-1-onto→wf1o 6534 ‘cfv 6535 (class class class)co 7416 ωcom 7868 ≈ cen 8956 Fincfn 8959 0cc0 11149 +∞cpnf 11289 ℕcn 12282 ℤcz 12640 ♯chash 14419 Basecbs 17326 mrClscmrc 17692 Grpcgrp 19083 .gcmg 19216 SubGrpcsubg 19269 odcod 19677 |
| 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 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7742 ax-inf2 9627 ax-cnex 11205 ax-resscn 11206 ax-1cn 11207 ax-icn 11208 ax-addcl 11209 ax-addrcl 11210 ax-mulcl 11211 ax-mulrcl 11212 ax-mulcom 11213 ax-addass 11214 ax-mulass 11215 ax-distr 11216 ax-i2m1 11217 ax-1ne0 11218 ax-1rid 11219 ax-rnegex 11220 ax-rrecex 11221 ax-cnre 11222 ax-pre-lttri 11223 ax-pre-lttrn 11224 ax-pre-ltadd 11225 ax-pre-mulgt0 11226 ax-pre-sup 11227 |
| 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 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 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-iin 4954 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-se 5609 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6301 df-ord 6362 df-on 6363 df-lim 6364 df-suc 6365 df-iota 6491 df-fun 6537 df-fn 6538 df-f 6539 df-f1 6540 df-fo 6541 df-f1o 6542 df-fv 6543 df-isom 6544 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7869 df-1st 7992 df-2nd 7993 df-frecs 8285 df-wrecs 8316 df-recs 8365 df-rdg 8404 df-1o 8462 df-2o 8463 df-oadd 8466 df-omul 8467 df-er 8703 df-map 8835 df-en 8960 df-dom 8961 df-sdom 8962 df-fin 8963 df-sup 9419 df-inf 9420 df-oi 9489 df-card 9969 df-acn 9972 df-pnf 11294 df-mnf 11295 df-xr 11296 df-ltxr 11297 df-le 11298 df-sub 11492 df-neg 11493 df-div 11921 df-nn 12283 df-2 12352 df-3 12353 df-n0 12554 df-z 12641 df-uz 12913 df-rp 13068 df-fz 13587 df-fl 13878 df-mod 13956 df-seq 14091 df-exp 14151 df-hash 14420 df-cj 15211 df-re 15212 df-im 15213 df-sqrt 15347 df-abs 15348 df-dvds 16368 df-sets 17281 df-slot 17299 df-ndx 17311 df-base 17327 df-ress 17348 df-plusg 17380 df-0g 17551 df-mre 17695 df-mrc 17696 df-acs 17698 df-mgm 18755 df-sgrp 18847 df-mnd 18863 df-submnd 18918 df-grp 19086 df-minusg 19087 df-sbg 19088 df-mulg 19217 df-subg 19272 df-od 19681 |
| This theorem is used by: odhash3 19729 |
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