Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > zextle | Structured version Visualization version GIF version |
Description: An extensionality-like property for integer ordering. (Contributed by NM, 29-Oct-2005.) |
Ref | Expression |
---|---|
zextle | ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ ∀𝑘 ∈ ℤ (𝑘 ≤ 𝑀 ↔ 𝑘 ≤ 𝑁)) → 𝑀 = 𝑁) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | zre 12323 | . . . . . . . . 9 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℝ) | |
2 | 1 | leidd 11541 | . . . . . . . 8 ⊢ (𝑀 ∈ ℤ → 𝑀 ≤ 𝑀) |
3 | 2 | adantr 481 | . . . . . . 7 ⊢ ((𝑀 ∈ ℤ ∧ ∀𝑘 ∈ ℤ (𝑘 ≤ 𝑀 ↔ 𝑘 ≤ 𝑁)) → 𝑀 ≤ 𝑀) |
4 | breq1 5077 | . . . . . . . . 9 ⊢ (𝑘 = 𝑀 → (𝑘 ≤ 𝑀 ↔ 𝑀 ≤ 𝑀)) | |
5 | breq1 5077 | . . . . . . . . 9 ⊢ (𝑘 = 𝑀 → (𝑘 ≤ 𝑁 ↔ 𝑀 ≤ 𝑁)) | |
6 | 4, 5 | bibi12d 346 | . . . . . . . 8 ⊢ (𝑘 = 𝑀 → ((𝑘 ≤ 𝑀 ↔ 𝑘 ≤ 𝑁) ↔ (𝑀 ≤ 𝑀 ↔ 𝑀 ≤ 𝑁))) |
7 | 6 | rspcva 3559 | . . . . . . 7 ⊢ ((𝑀 ∈ ℤ ∧ ∀𝑘 ∈ ℤ (𝑘 ≤ 𝑀 ↔ 𝑘 ≤ 𝑁)) → (𝑀 ≤ 𝑀 ↔ 𝑀 ≤ 𝑁)) |
8 | 3, 7 | mpbid 231 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ ∀𝑘 ∈ ℤ (𝑘 ≤ 𝑀 ↔ 𝑘 ≤ 𝑁)) → 𝑀 ≤ 𝑁) |
9 | 8 | adantlr 712 | . . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ ∀𝑘 ∈ ℤ (𝑘 ≤ 𝑀 ↔ 𝑘 ≤ 𝑁)) → 𝑀 ≤ 𝑁) |
10 | zre 12323 | . . . . . . . . 9 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℝ) | |
11 | 10 | leidd 11541 | . . . . . . . 8 ⊢ (𝑁 ∈ ℤ → 𝑁 ≤ 𝑁) |
12 | 11 | adantr 481 | . . . . . . 7 ⊢ ((𝑁 ∈ ℤ ∧ ∀𝑘 ∈ ℤ (𝑘 ≤ 𝑀 ↔ 𝑘 ≤ 𝑁)) → 𝑁 ≤ 𝑁) |
13 | breq1 5077 | . . . . . . . . 9 ⊢ (𝑘 = 𝑁 → (𝑘 ≤ 𝑀 ↔ 𝑁 ≤ 𝑀)) | |
14 | breq1 5077 | . . . . . . . . 9 ⊢ (𝑘 = 𝑁 → (𝑘 ≤ 𝑁 ↔ 𝑁 ≤ 𝑁)) | |
15 | 13, 14 | bibi12d 346 | . . . . . . . 8 ⊢ (𝑘 = 𝑁 → ((𝑘 ≤ 𝑀 ↔ 𝑘 ≤ 𝑁) ↔ (𝑁 ≤ 𝑀 ↔ 𝑁 ≤ 𝑁))) |
16 | 15 | rspcva 3559 | . . . . . . 7 ⊢ ((𝑁 ∈ ℤ ∧ ∀𝑘 ∈ ℤ (𝑘 ≤ 𝑀 ↔ 𝑘 ≤ 𝑁)) → (𝑁 ≤ 𝑀 ↔ 𝑁 ≤ 𝑁)) |
17 | 12, 16 | mpbird 256 | . . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ ∀𝑘 ∈ ℤ (𝑘 ≤ 𝑀 ↔ 𝑘 ≤ 𝑁)) → 𝑁 ≤ 𝑀) |
18 | 17 | adantll 711 | . . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ ∀𝑘 ∈ ℤ (𝑘 ≤ 𝑀 ↔ 𝑘 ≤ 𝑁)) → 𝑁 ≤ 𝑀) |
19 | 9, 18 | jca 512 | . . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ ∀𝑘 ∈ ℤ (𝑘 ≤ 𝑀 ↔ 𝑘 ≤ 𝑁)) → (𝑀 ≤ 𝑁 ∧ 𝑁 ≤ 𝑀)) |
20 | 19 | ex 413 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (∀𝑘 ∈ ℤ (𝑘 ≤ 𝑀 ↔ 𝑘 ≤ 𝑁) → (𝑀 ≤ 𝑁 ∧ 𝑁 ≤ 𝑀))) |
21 | letri3 11060 | . . . 4 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (𝑀 = 𝑁 ↔ (𝑀 ≤ 𝑁 ∧ 𝑁 ≤ 𝑀))) | |
22 | 1, 10, 21 | syl2an 596 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 = 𝑁 ↔ (𝑀 ≤ 𝑁 ∧ 𝑁 ≤ 𝑀))) |
23 | 20, 22 | sylibrd 258 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (∀𝑘 ∈ ℤ (𝑘 ≤ 𝑀 ↔ 𝑘 ≤ 𝑁) → 𝑀 = 𝑁)) |
24 | 23 | 3impia 1116 | 1 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ ∀𝑘 ∈ ℤ (𝑘 ≤ 𝑀 ↔ 𝑘 ≤ 𝑁)) → 𝑀 = 𝑁) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ∀wral 3064 class class class wbr 5074 ℝcr 10870 ≤ cle 11010 ℤcz 12319 |
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 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-resscn 10928 ax-pre-lttri 10945 ax-pre-lttrn 10946 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-nel 3050 df-ral 3069 df-rex 3070 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-br 5075 df-opab 5137 df-mpt 5158 df-id 5489 df-po 5503 df-so 5504 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-ov 7278 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-neg 11208 df-z 12320 |
This theorem is referenced by: zextlt 12394 |
Copyright terms: Public domain | W3C validator |