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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 8121 | . 2 ⊢ (𝐴 ∈ ℝ → 𝐴 ≠ -∞) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → 𝐴 ≠ -∞) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2176 ≠ wne 2376 ℝcr 7924 -∞cmnf 8105 |
| 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 615 ax-in2 616 ax-io 711 ax-5 1470 ax-7 1471 ax-gen 1472 ax-ie1 1516 ax-ie2 1517 ax-8 1527 ax-10 1528 ax-11 1529 ax-i12 1530 ax-bndl 1532 ax-4 1533 ax-17 1549 ax-i9 1553 ax-ial 1557 ax-i5r 1558 ax-ext 2187 ax-setind 4585 ax-cnex 8016 ax-resscn 8017 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1484 df-sb 1786 df-clab 2192 df-cleq 2198 df-clel 2201 df-nfc 2337 df-ne 2377 df-nel 2472 df-ral 2489 df-v 2774 df-dif 3168 df-un 3170 df-in 3172 df-ss 3179 df-pw 3618 df-sn 3639 df-pr 3640 df-uni 3851 df-pnf 8109 df-mnf 8110 |
| This theorem is referenced by: xnn0nemnf 9369 xaddnemnf 9979 xposdif 10004 xleaddadd 10009 xrbdtri 11587 |
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