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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 | NN0* |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | xnn0xr 9203 | . 2 NN0* | |
2 | xnn0nemnf 9209 | . 2 NN0* | |
3 | 1, 2 | jca 304 | 1 NN0* |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wcel 2141 wne 2340 cmnf 7952 cxr 7953 NN0*cxnn0 9198 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-sep 4107 ax-pow 4160 ax-un 4418 ax-setind 4521 ax-cnex 7865 ax-resscn 7866 ax-1re 7868 ax-addrcl 7871 ax-rnegex 7883 |
This theorem depends on definitions: df-bi 116 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-nel 2436 df-ral 2453 df-rex 2454 df-rab 2457 df-v 2732 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-pw 3568 df-sn 3589 df-pr 3590 df-uni 3797 df-int 3832 df-pnf 7956 df-mnf 7957 df-xr 7958 df-inn 8879 df-n0 9136 df-xnn0 9199 |
This theorem is referenced by: xnn0xadd0 9824 xnn0add4d 9843 |
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