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| Mirrors > Home > MPE Home > Th. List > Mathboxes > uzindd | Structured version Visualization version GIF version | ||
| Description: Induction on the upper integers that start at 𝑀. The first four hypotheses give us the substitution instances we need; the following two are the basis and the induction step, a deduction version. (Contributed by metakunt, 8-Jun-2024.) |
| Ref | Expression |
|---|---|
| uzindd.1 | ⊢ (𝑗 = 𝑀 → (𝜓 ↔ 𝜒)) |
| uzindd.2 | ⊢ (𝑗 = 𝑘 → (𝜓 ↔ 𝜃)) |
| uzindd.3 | ⊢ (𝑗 = (𝑘 + 1) → (𝜓 ↔ 𝜏)) |
| uzindd.4 | ⊢ (𝑗 = 𝑁 → (𝜓 ↔ 𝜂)) |
| uzindd.5 | ⊢ (𝜑 → 𝜒) |
| uzindd.6 | ⊢ ((𝜑 ∧ 𝜃 ∧ (𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘)) → 𝜏) |
| uzindd.7 | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
| uzindd.8 | ⊢ (𝜑 → 𝑁 ∈ ℤ) |
| uzindd.9 | ⊢ (𝜑 → 𝑀 ≤ 𝑁) |
| Ref | Expression |
|---|---|
| uzindd | ⊢ (𝜑 → 𝜂) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | uzindd.7 | . . 3 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
| 2 | uzindd.8 | . . 3 ⊢ (𝜑 → 𝑁 ∈ ℤ) | |
| 3 | uzindd.9 | . . 3 ⊢ (𝜑 → 𝑀 ≤ 𝑁) | |
| 4 | 1, 2, 3 | 3jca 1146 | . 2 ⊢ (𝜑 → (𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝑀 ≤ 𝑁)) |
| 5 | uzindd.1 | . . . 4 ⊢ (𝑗 = 𝑀 → (𝜓 ↔ 𝜒)) | |
| 6 | 5 | imbi2d 343 | . . 3 ⊢ (𝑗 = 𝑀 → ((𝜑 → 𝜓) ↔ (𝜑 → 𝜒))) |
| 7 | uzindd.2 | . . . 4 ⊢ (𝑗 = 𝑘 → (𝜓 ↔ 𝜃)) | |
| 8 | 7 | imbi2d 343 | . . 3 ⊢ (𝑗 = 𝑘 → ((𝜑 → 𝜓) ↔ (𝜑 → 𝜃))) |
| 9 | uzindd.3 | . . . 4 ⊢ (𝑗 = (𝑘 + 1) → (𝜓 ↔ 𝜏)) | |
| 10 | 9 | imbi2d 343 | . . 3 ⊢ (𝑗 = (𝑘 + 1) → ((𝜑 → 𝜓) ↔ (𝜑 → 𝜏))) |
| 11 | uzindd.4 | . . . 4 ⊢ (𝑗 = 𝑁 → (𝜓 ↔ 𝜂)) | |
| 12 | 11 | imbi2d 343 | . . 3 ⊢ (𝑗 = 𝑁 → ((𝜑 → 𝜓) ↔ (𝜑 → 𝜂))) |
| 13 | uzindd.5 | . . . . 5 ⊢ (𝜑 → 𝜒) | |
| 14 | 13 | adantr 486 | . . . 4 ⊢ ((𝜑 ∧ 𝑀 ∈ ℤ) → 𝜒) |
| 15 | 14 | expcom 419 | . . 3 ⊢ (𝑀 ∈ ℤ → (𝜑 → 𝜒)) |
| 16 | 3anass 1111 | . . . . . . . . . 10 ⊢ ((𝑀 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘) ↔ (𝑀 ∈ ℤ ∧ (𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘))) | |
| 17 | ancom 466 | . . . . . . . . . 10 ⊢ ((𝑀 ∈ ℤ ∧ (𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘)) ↔ ((𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘) ∧ 𝑀 ∈ ℤ)) | |
| 18 | 16, 17 | bitri 278 | . . . . . . . . 9 ⊢ ((𝑀 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘) ↔ ((𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘) ∧ 𝑀 ∈ ℤ)) |
| 19 | uzindd.6 | . . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝜃 ∧ (𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘)) → 𝜏) | |
| 20 | 19 | ad4ant123 1191 | . . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝜃) ∧ (𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘)) ∧ 𝑀 ∈ ℤ) → 𝜏) |
| 21 | 20 | anasss 472 | . . . . . . . . 9 ⊢ (((𝜑 ∧ 𝜃) ∧ ((𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘) ∧ 𝑀 ∈ ℤ)) → 𝜏) |
| 22 | 18, 21 | sylan2b 606 | . . . . . . . 8 ⊢ (((𝜑 ∧ 𝜃) ∧ (𝑀 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘)) → 𝜏) |
| 23 | 22 | 3impa 1127 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝜃 ∧ (𝑀 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘)) → 𝜏) |
| 24 | 23 | 3com23 1144 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑀 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘) ∧ 𝜃) → 𝜏) |
| 25 | 24 | 3expia 1139 | . . . . 5 ⊢ ((𝜑 ∧ (𝑀 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘)) → (𝜃 → 𝜏)) |
| 26 | 25 | expcom 419 | . . . 4 ⊢ ((𝑀 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘) → (𝜑 → (𝜃 → 𝜏))) |
| 27 | 26 | a2d 30 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘) → ((𝜑 → 𝜃) → (𝜑 → 𝜏))) |
| 28 | 6, 8, 10, 12, 15, 27 | uzind 12708 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝑀 ≤ 𝑁) → (𝜑 → 𝜂)) |
| 29 | 4, 28 | mpcom 39 | 1 ⊢ (𝜑 → 𝜂) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∧ w3a 1103 = wceq 1570 ∈ wcel 2146 class class class wbr 5111 (class class class)co 7419 1c1 11120 + caddc 11122 ≤ cle 11263 ℤcz 12610 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-resscn 11176 ax-1cn 11177 ax-icn 11178 ax-addcl 11179 ax-addrcl 11180 ax-mulcl 11181 ax-mulrcl 11182 ax-mulcom 11183 ax-addass 11184 ax-mulass 11185 ax-distr 11186 ax-i2m1 11187 ax-1ne0 11188 ax-1rid 11189 ax-rnegex 11190 ax-rrecex 11191 ax-cnre 11192 ax-pre-lttri 11193 ax-pre-lttrn 11194 ax-pre-ltadd 11195 ax-pre-mulgt0 11196 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7376 df-ov 7422 df-oprab 7423 df-mpo 7424 df-om 7869 df-2nd 7993 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-er 8700 df-en 8950 df-dom 8951 df-sdom 8952 df-pnf 11264 df-mnf 11265 df-xr 11266 df-ltxr 11267 df-le 11268 df-sub 11462 df-neg 11463 df-nn 12253 df-n0 12524 df-z 12611 |
| This theorem is used by: 2ap1caineq 42974 |
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