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| Mirrors > Home > ILE Home > Th. List > renemnfd | GIF version | ||
| Description: No real equals minus infinity. (Contributed by Mario Carneiro, 28-May-2016.) |
| Ref | Expression |
|---|---|
| rexrd.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| Ref | Expression |
|---|---|
| renemnfd | ⊢ (𝜑 → 𝐴 ≠ -∞) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rexrd.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 2 | renemnf 8230 | . 2 ⊢ (𝐴 ∈ ℝ → 𝐴 ≠ -∞) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → 𝐴 ≠ -∞) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2201 ≠ wne 2401 ℝcr 8033 -∞cmnf 8214 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2212 ax-setind 4634 ax-cnex 8125 ax-resscn 8126 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1810 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-ne 2402 df-nel 2497 df-ral 2514 df-v 2803 df-dif 3201 df-un 3203 df-in 3205 df-ss 3212 df-pw 3653 df-sn 3674 df-pr 3675 df-uni 3893 df-pnf 8218 df-mnf 8219 |
| This theorem is referenced by: xnn0nemnf 9478 xaddnemnf 10094 xposdif 10119 xleaddadd 10124 xrbdtri 11856 |
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