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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 8364 | . 2 ⊢ (𝐴 ∈ ℝ → 𝐴 ≠ -∞) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → 𝐴 ≠ -∞) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2209 ≠ wne 2420 ℝcr 8168 -∞cmnf 8348 |
| 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 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-setind 4679 ax-cnex 8260 ax-resscn 8261 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-v 2823 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3687 df-sn 3711 df-pr 3712 df-uni 3931 df-pnf 8352 df-mnf 8353 |
| This theorem is referenced by: xnn0nemnf 9620 xaddnemnf 10238 xposdif 10263 xleaddadd 10268 xrbdtri 12020 |
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