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| Mirrors > Home > MPE Home > Th. List > uzind4i | Structured version Visualization version GIF version | ||
| Description: Induction on the upper integers that start at 𝑀. The first four give us the substitution instances we need, and the last two are the basis and the induction step. This is a stronger version of uzind4 12980 assuming that 𝜓 holds unconditionally. Notice that 𝑁 ∈ (ℤ≥‘𝑀) implies that the lower bound 𝑀 is an integer (𝑀 ∈ ℤ, see eluzel2 12917). (Contributed by NM, 4-Sep-2005.) (Revised by AV, 13-Jul-2022.) |
| Ref | Expression |
|---|---|
| uzind4i.1 | ⊢ (𝑗 = 𝑀 → (𝜑 ↔ 𝜓)) |
| uzind4i.2 | ⊢ (𝑗 = 𝑘 → (𝜑 ↔ 𝜒)) |
| uzind4i.3 | ⊢ (𝑗 = (𝑘 + 1) → (𝜑 ↔ 𝜃)) |
| uzind4i.4 | ⊢ (𝑗 = 𝑁 → (𝜑 ↔ 𝜏)) |
| uzind4i.5 | ⊢ 𝜓 |
| uzind4i.6 | ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → (𝜒 → 𝜃)) |
| Ref | Expression |
|---|---|
| uzind4i | ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝜏) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | uzind4i.1 | . 2 ⊢ (𝑗 = 𝑀 → (𝜑 ↔ 𝜓)) | |
| 2 | uzind4i.2 | . 2 ⊢ (𝑗 = 𝑘 → (𝜑 ↔ 𝜒)) | |
| 3 | uzind4i.3 | . 2 ⊢ (𝑗 = (𝑘 + 1) → (𝜑 ↔ 𝜃)) | |
| 4 | uzind4i.4 | . 2 ⊢ (𝑗 = 𝑁 → (𝜑 ↔ 𝜏)) | |
| 5 | uzind4i.5 | . . 3 ⊢ 𝜓 | |
| 6 | 5 | a1i 11 | . 2 ⊢ (𝑀 ∈ ℤ → 𝜓) |
| 7 | uzind4i.6 | . 2 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → (𝜒 → 𝜃)) | |
| 8 | 1, 2, 3, 4, 6, 7 | uzind4 12980 | 1 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝜏) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2145 ‘cfv 6535 (class class class)co 7416 1c1 11150 + caddc 11152 ℤcz 12640 ℤ≥cuz 12912 |
| 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-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7742 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 |
| 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-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-iun 4953 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-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-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7869 df-2nd 7993 df-frecs 8285 df-wrecs 8316 df-recs 8365 df-rdg 8404 df-er 8703 df-en 8960 df-dom 8961 df-sdom 8962 df-pnf 11294 df-mnf 11295 df-xr 11296 df-ltxr 11297 df-le 11298 df-sub 11492 df-neg 11493 df-nn 12283 df-n0 12554 df-z 12641 df-uz 12913 |
| This theorem is used by: uzwo 12985 om2uzrani 14041 seqfveq2 14113 monoord 14121 seqhomo 14138 leexp2r 14263 cvgrat 15997 ntrivcvgfvn0 16013 ruclem9 16351 dvdsfac 16441 smuval2 16597 smupvallem 16598 prmreclem4 17036 vdwlem13 17110 2expltfac 17209 telgsumfzs 20142 aaliou3lem2 26611 chtub 27480 bclbnd 27548 |
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