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Mirrors > Home > ILE Home > Th. List > ltrelxr | Unicode version |
Description: 'Less than' is a relation on extended reals. (Contributed by Mario Carneiro, 28-Apr-2015.) |
Ref | Expression |
---|---|
ltrelxr |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-ltxr 7996 |
. 2
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2 | df-3an 980 |
. . . . . 6
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3 | 2 | opabbii 4070 |
. . . . 5
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4 | opabssxp 4700 |
. . . . 5
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5 | 3, 4 | eqsstri 3187 |
. . . 4
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6 | rexpssxrxp 8001 |
. . . 4
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7 | 5, 6 | sstri 3164 |
. . 3
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8 | ressxr 8000 |
. . . . . 6
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9 | snsspr2 3741 |
. . . . . . 7
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10 | ssun2 3299 |
. . . . . . . 8
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11 | df-xr 7995 |
. . . . . . . 8
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12 | 10, 11 | sseqtrri 3190 |
. . . . . . 7
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13 | 9, 12 | sstri 3164 |
. . . . . 6
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14 | 8, 13 | unssi 3310 |
. . . . 5
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15 | snsspr1 3740 |
. . . . . 6
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16 | 15, 12 | sstri 3164 |
. . . . 5
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17 | xpss12 4733 |
. . . . 5
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18 | 14, 16, 17 | mp2an 426 |
. . . 4
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19 | xpss12 4733 |
. . . . 5
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20 | 13, 8, 19 | mp2an 426 |
. . . 4
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21 | 18, 20 | unssi 3310 |
. . 3
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22 | 7, 21 | unssi 3310 |
. 2
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23 | 1, 22 | eqsstri 3187 |
1
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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-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-ext 2159 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-nf 1461 df-sb 1763 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-v 2739 df-un 3133 df-in 3135 df-ss 3142 df-pr 3599 df-opab 4065 df-xp 4632 df-xr 7995 df-ltxr 7996 |
This theorem is referenced by: ltrel 8018 |
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