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| Mirrors > Home > MPE Home > Th. List > uzind4s | Structured version Visualization version GIF version | ||
| Description: Induction on the upper set of integers that starts at an integer 𝑀, using explicit substitution. The hypotheses are the basis and the induction step. (Contributed by NM, 4-Nov-2005.) |
| Ref | Expression |
|---|---|
| uzind4s.1 | ⊢ (𝑀 ∈ ℤ → [𝑀 / 𝑘]𝜑) |
| uzind4s.2 | ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → (𝜑 → [(𝑘 + 1) / 𝑘]𝜑)) |
| Ref | Expression |
|---|---|
| uzind4s | ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → [𝑁 / 𝑘]𝜑) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfsbcq2 3756 | . 2 ⊢ (𝑗 = 𝑀 → ([𝑗 / 𝑘]𝜑 ↔ [𝑀 / 𝑘]𝜑)) | |
| 2 | sbequ 2084 | . 2 ⊢ (𝑗 = 𝑚 → ([𝑗 / 𝑘]𝜑 ↔ [𝑚 / 𝑘]𝜑)) | |
| 3 | dfsbcq2 3756 | . 2 ⊢ (𝑗 = (𝑚 + 1) → ([𝑗 / 𝑘]𝜑 ↔ [(𝑚 + 1) / 𝑘]𝜑)) | |
| 4 | dfsbcq2 3756 | . 2 ⊢ (𝑗 = 𝑁 → ([𝑗 / 𝑘]𝜑 ↔ [𝑁 / 𝑘]𝜑)) | |
| 5 | uzind4s.1 | . 2 ⊢ (𝑀 ∈ ℤ → [𝑀 / 𝑘]𝜑) | |
| 6 | nfv 1914 | . . . 4 ⊢ Ⅎ𝑘 𝑚 ∈ (ℤ≥‘𝑀) | |
| 7 | nfs1v 2157 | . . . . 5 ⊢ Ⅎ𝑘[𝑚 / 𝑘]𝜑 | |
| 8 | nfsbc1v 3773 | . . . . 5 ⊢ Ⅎ𝑘[(𝑚 + 1) / 𝑘]𝜑 | |
| 9 | 7, 8 | nfim 1896 | . . . 4 ⊢ Ⅎ𝑘([𝑚 / 𝑘]𝜑 → [(𝑚 + 1) / 𝑘]𝜑) |
| 10 | 6, 9 | nfim 1896 | . . 3 ⊢ Ⅎ𝑘(𝑚 ∈ (ℤ≥‘𝑀) → ([𝑚 / 𝑘]𝜑 → [(𝑚 + 1) / 𝑘]𝜑)) |
| 11 | eleq1w 2811 | . . . 4 ⊢ (𝑘 = 𝑚 → (𝑘 ∈ (ℤ≥‘𝑀) ↔ 𝑚 ∈ (ℤ≥‘𝑀))) | |
| 12 | sbequ12 2252 | . . . . 5 ⊢ (𝑘 = 𝑚 → (𝜑 ↔ [𝑚 / 𝑘]𝜑)) | |
| 13 | oveq1 7394 | . . . . . 6 ⊢ (𝑘 = 𝑚 → (𝑘 + 1) = (𝑚 + 1)) | |
| 14 | 13 | sbceq1d 3758 | . . . . 5 ⊢ (𝑘 = 𝑚 → ([(𝑘 + 1) / 𝑘]𝜑 ↔ [(𝑚 + 1) / 𝑘]𝜑)) |
| 15 | 12, 14 | imbi12d 344 | . . . 4 ⊢ (𝑘 = 𝑚 → ((𝜑 → [(𝑘 + 1) / 𝑘]𝜑) ↔ ([𝑚 / 𝑘]𝜑 → [(𝑚 + 1) / 𝑘]𝜑))) |
| 16 | 11, 15 | imbi12d 344 | . . 3 ⊢ (𝑘 = 𝑚 → ((𝑘 ∈ (ℤ≥‘𝑀) → (𝜑 → [(𝑘 + 1) / 𝑘]𝜑)) ↔ (𝑚 ∈ (ℤ≥‘𝑀) → ([𝑚 / 𝑘]𝜑 → [(𝑚 + 1) / 𝑘]𝜑)))) |
| 17 | uzind4s.2 | . . 3 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → (𝜑 → [(𝑘 + 1) / 𝑘]𝜑)) | |
| 18 | 10, 16, 17 | chvarfv 2241 | . 2 ⊢ (𝑚 ∈ (ℤ≥‘𝑀) → ([𝑚 / 𝑘]𝜑 → [(𝑚 + 1) / 𝑘]𝜑)) |
| 19 | 1, 2, 3, 4, 5, 18 | uzind4 12865 | 1 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → [𝑁 / 𝑘]𝜑) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 [wsb 2065 ∈ wcel 2109 [wsbc 3753 ‘cfv 6511 (class class class)co 7387 1c1 11069 + caddc 11071 ℤcz 12529 ℤ≥cuz 12793 |
| 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 2701 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 ax-cnex 11124 ax-resscn 11125 ax-1cn 11126 ax-icn 11127 ax-addcl 11128 ax-addrcl 11129 ax-mulcl 11130 ax-mulrcl 11131 ax-mulcom 11132 ax-addass 11133 ax-mulass 11134 ax-distr 11135 ax-i2m1 11136 ax-1ne0 11137 ax-1rid 11138 ax-rnegex 11139 ax-rrecex 11140 ax-cnre 11141 ax-pre-lttri 11142 ax-pre-lttrn 11143 ax-pre-ltadd 11144 ax-pre-mulgt0 11145 |
| 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 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-reu 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-pss 3934 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-iun 4957 df-br 5108 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5533 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5591 df-we 5593 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-pred 6274 df-ord 6335 df-on 6336 df-lim 6337 df-suc 6338 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-riota 7344 df-ov 7390 df-oprab 7391 df-mpo 7392 df-om 7843 df-2nd 7969 df-frecs 8260 df-wrecs 8291 df-recs 8340 df-rdg 8378 df-er 8671 df-en 8919 df-dom 8920 df-sdom 8921 df-pnf 11210 df-mnf 11211 df-xr 11212 df-ltxr 11213 df-le 11214 df-sub 11407 df-neg 11408 df-nn 12187 df-n0 12443 df-z 12530 df-uz 12794 |
| This theorem is referenced by: (None) |
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