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| Mirrors > Home > ILE Home > Th. List > xnn0xrnemnf | Unicode version | ||
| Description: The extended nonnegative integers are extended reals without negative infinity. (Contributed by AV, 10-Dec-2020.) |
| Ref | Expression |
|---|---|
| xnn0xrnemnf |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xnn0xr 9617 |
. 2
| |
| 2 | xnn0nemnf 9623 |
. 2
| |
| 3 | 1, 2 | jca 306 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| 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-14 2212 ax-ext 2220 ax-sep 4247 ax-pow 4309 ax-un 4576 ax-setind 4682 ax-cnex 8263 ax-resscn 8264 ax-1re 8266 ax-addrcl 8269 ax-rnegex 8281 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 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-rex 2534 df-rab 2537 df-v 2823 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3714 df-pr 3715 df-uni 3934 df-int 3969 df-pnf 8355 df-mnf 8356 df-xr 8357 df-inn 9287 df-n0 9546 df-xnn0 9613 |
| This theorem is referenced by: xnn0xadd0 10251 xnn0add4d 10270 |
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