| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 8218 | . 2 ⊢ (𝐴 ∈ ℝ → 𝐴 ≠ -∞) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → 𝐴 ≠ -∞) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2200 ≠ wne 2400 ℝcr 8021 -∞cmnf 8202 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 ax-setind 4633 ax-cnex 8113 ax-resscn 8114 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-v 2802 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-uni 3892 df-pnf 8206 df-mnf 8207 |
| This theorem is referenced by: xnn0nemnf 9466 xaddnemnf 10082 xposdif 10107 xleaddadd 10112 xrbdtri 11827 |
| Copyright terms: Public domain | W3C validator |