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| Mirrors > Home > MPE Home > Th. List > uzind4ALT | Structured version Visualization version GIF version | ||
| Description: Induction on the upper set of integers that starts at an integer 𝑀. The last four hypotheses give us the substitution instances we need; the first two are the basis and the induction step. Either uzind4 12850 or uzind4ALT 12851 may be used; see comment for nnind 12186. (Contributed by NM, 7-Sep-2005.) (New usage is discouraged.) (Proof modification is discouraged.) |
| Ref | Expression |
|---|---|
| uzind4ALT.5 | ⊢ (𝑀 ∈ ℤ → 𝜓) |
| uzind4ALT.6 | ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → (𝜒 → 𝜃)) |
| uzind4ALT.1 | ⊢ (𝑗 = 𝑀 → (𝜑 ↔ 𝜓)) |
| uzind4ALT.2 | ⊢ (𝑗 = 𝑘 → (𝜑 ↔ 𝜒)) |
| uzind4ALT.3 | ⊢ (𝑗 = (𝑘 + 1) → (𝜑 ↔ 𝜃)) |
| uzind4ALT.4 | ⊢ (𝑗 = 𝑁 → (𝜑 ↔ 𝜏)) |
| Ref | Expression |
|---|---|
| uzind4ALT | ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝜏) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | uzind4ALT.1 | . 2 ⊢ (𝑗 = 𝑀 → (𝜑 ↔ 𝜓)) | |
| 2 | uzind4ALT.2 | . 2 ⊢ (𝑗 = 𝑘 → (𝜑 ↔ 𝜒)) | |
| 3 | uzind4ALT.3 | . 2 ⊢ (𝑗 = (𝑘 + 1) → (𝜑 ↔ 𝜃)) | |
| 4 | uzind4ALT.4 | . 2 ⊢ (𝑗 = 𝑁 → (𝜑 ↔ 𝜏)) | |
| 5 | uzind4ALT.5 | . 2 ⊢ (𝑀 ∈ ℤ → 𝜓) | |
| 6 | uzind4ALT.6 | . 2 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → (𝜒 → 𝜃)) | |
| 7 | 1, 2, 3, 4, 5, 6 | uzind4 12850 | 1 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝜏) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 207 = wceq 1543 ∈ wcel 2115 ‘cfv 6488 (class class class)co 7359 1c1 11033 + caddc 11035 ℤcz 12518 ℤ≥cuz 12782 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1970 ax-7 2011 ax-8 2117 ax-9 2125 ax-10 2148 ax-11 2164 ax-12 2185 ax-ext 2708 ax-sep 5221 ax-nul 5231 ax-pow 5297 ax-pr 5365 ax-un 7681 ax-cnex 11088 ax-resscn 11089 ax-1cn 11090 ax-icn 11091 ax-addcl 11092 ax-addrcl 11093 ax-mulcl 11094 ax-mulrcl 11095 ax-mulcom 11096 ax-addass 11097 ax-mulass 11098 ax-distr 11099 ax-i2m1 11100 ax-1ne0 11101 ax-1rid 11102 ax-rnegex 11103 ax-rrecex 11104 ax-cnre 11105 ax-pre-lttri 11106 ax-pre-lttrn 11107 ax-pre-ltadd 11108 ax-pre-mulgt0 11109 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 850 df-3or 1089 df-3an 1090 df-tru 1546 df-fal 1556 df-ex 1783 df-nf 1787 df-sb 2070 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2932 df-nel 3036 df-ral 3051 df-rex 3061 df-reu 3342 df-rab 3389 df-v 3430 df-sbc 3727 df-csb 3835 df-dif 3889 df-un 3891 df-in 3893 df-ss 3903 df-pss 3906 df-nul 4265 df-if 4458 df-pw 4534 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4842 df-iun 4926 df-br 5076 df-opab 5138 df-mpt 5157 df-tr 5183 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6255 df-ord 6316 df-on 6317 df-lim 6318 df-suc 6319 df-iota 6444 df-fun 6490 df-fn 6491 df-f 6492 df-f1 6493 df-fo 6494 df-f1o 6495 df-fv 6496 df-riota 7316 df-ov 7362 df-oprab 7363 df-mpo 7364 df-om 7810 df-2nd 7935 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-rdg 8342 df-er 8636 df-en 8887 df-dom 8888 df-sdom 8889 df-pnf 11175 df-mnf 11176 df-xr 11177 df-ltxr 11178 df-le 11179 df-sub 11373 df-neg 11374 df-nn 12169 df-n0 12432 df-z 12519 df-uz 12783 |
| This theorem is referenced by: (None) |
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