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| Mirrors > Home > ILE Home > Th. List > renepnfd | GIF version | ||
| Description: No (finite) real equals plus infinity. (Contributed by Mario Carneiro, 28-May-2016.) |
| Ref | Expression |
|---|---|
| rexrd.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| Ref | Expression |
|---|---|
| renepnfd | ⊢ (𝜑 → 𝐴 ≠ +∞) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rexrd.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 2 | renepnf 8286 | . 2 ⊢ (𝐴 ∈ ℝ → 𝐴 ≠ +∞) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → 𝐴 ≠ +∞) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2202 ≠ wne 2403 ℝcr 8091 +∞cpnf 8270 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-un 4536 ax-cnex 8183 ax-resscn 8184 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ne 2404 df-nel 2499 df-rex 2517 df-rab 2520 df-v 2805 df-in 3207 df-ss 3214 df-pw 3658 df-uni 3899 df-pnf 8275 |
| This theorem is referenced by: xaddnepnf 10154 xqltnle 10590 |
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