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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 8226 | . 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 2402 ℝcr 8030 +∞cpnf 8210 |
| 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-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-un 4530 ax-cnex 8122 ax-resscn 8123 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-nel 2498 df-rex 2516 df-rab 2519 df-v 2804 df-in 3206 df-ss 3213 df-pw 3654 df-uni 3894 df-pnf 8215 |
| This theorem is referenced by: xaddnepnf 10092 xqltnle 10526 |
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