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Mirrors > Home > ILE Home > Th. List > axpre-mulgt0 | Unicode version |
Description: The product of two positive reals is positive. Axiom for real and complex numbers, derived from set theory. This construction-dependent theorem should not be referenced directly; instead, use ax-pre-mulgt0 7946. (Contributed by NM, 13-May-1996.) (New usage is discouraged.) |
Ref | Expression |
---|---|
axpre-mulgt0 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elreal 7845 |
. 2
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2 | elreal 7845 |
. 2
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3 | breq2 4022 |
. . . 4
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4 | 3 | anbi1d 465 |
. . 3
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5 | oveq1 5898 |
. . . 4
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6 | 5 | breq2d 4030 |
. . 3
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7 | 4, 6 | imbi12d 234 |
. 2
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8 | breq2 4022 |
. . . 4
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9 | 8 | anbi2d 464 |
. . 3
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10 | oveq2 5899 |
. . . 4
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11 | 10 | breq2d 4030 |
. . 3
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12 | 9, 11 | imbi12d 234 |
. 2
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13 | df-0 7836 |
. . . . . 6
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14 | 13 | breq1i 4025 |
. . . . 5
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15 | ltresr 7856 |
. . . . 5
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16 | 14, 15 | bitri 184 |
. . . 4
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17 | 13 | breq1i 4025 |
. . . . 5
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18 | ltresr 7856 |
. . . . 5
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19 | 17, 18 | bitri 184 |
. . . 4
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20 | mulgt0sr 7795 |
. . . 4
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21 | 16, 19, 20 | syl2anb 291 |
. . 3
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22 | 13 | a1i 9 |
. . . . 5
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23 | mulresr 7855 |
. . . . 5
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24 | 22, 23 | breq12d 4031 |
. . . 4
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25 | ltresr 7856 |
. . . 4
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26 | 24, 25 | bitrdi 196 |
. . 3
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27 | 21, 26 | imbitrrid 156 |
. 2
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28 | 1, 2, 7, 12, 27 | 2gencl 2785 |
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-in1 615 ax-in2 616 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2162 ax-14 2163 ax-ext 2171 ax-coll 4133 ax-sep 4136 ax-nul 4144 ax-pow 4189 ax-pr 4224 ax-un 4448 ax-setind 4551 ax-iinf 4602 |
This theorem depends on definitions: df-bi 117 df-dc 836 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2041 df-mo 2042 df-clab 2176 df-cleq 2182 df-clel 2185 df-nfc 2321 df-ne 2361 df-ral 2473 df-rex 2474 df-reu 2475 df-rab 2477 df-v 2754 df-sbc 2978 df-csb 3073 df-dif 3146 df-un 3148 df-in 3150 df-ss 3157 df-nul 3438 df-pw 3592 df-sn 3613 df-pr 3614 df-op 3616 df-uni 3825 df-int 3860 df-iun 3903 df-br 4019 df-opab 4080 df-mpt 4081 df-tr 4117 df-eprel 4304 df-id 4308 df-po 4311 df-iso 4312 df-iord 4381 df-on 4383 df-suc 4386 df-iom 4605 df-xp 4647 df-rel 4648 df-cnv 4649 df-co 4650 df-dm 4651 df-rn 4652 df-res 4653 df-ima 4654 df-iota 5193 df-fun 5233 df-fn 5234 df-f 5235 df-f1 5236 df-fo 5237 df-f1o 5238 df-fv 5239 df-ov 5894 df-oprab 5895 df-mpo 5896 df-1st 6159 df-2nd 6160 df-recs 6324 df-irdg 6389 df-1o 6435 df-2o 6436 df-oadd 6439 df-omul 6440 df-er 6553 df-ec 6555 df-qs 6559 df-ni 7321 df-pli 7322 df-mi 7323 df-lti 7324 df-plpq 7361 df-mpq 7362 df-enq 7364 df-nqqs 7365 df-plqqs 7366 df-mqqs 7367 df-1nqqs 7368 df-rq 7369 df-ltnqqs 7370 df-enq0 7441 df-nq0 7442 df-0nq0 7443 df-plq0 7444 df-mq0 7445 df-inp 7483 df-i1p 7484 df-iplp 7485 df-imp 7486 df-iltp 7487 df-enr 7743 df-nr 7744 df-plr 7745 df-mr 7746 df-ltr 7747 df-0r 7748 df-m1r 7750 df-c 7835 df-0 7836 df-r 7839 df-mul 7841 df-lt 7842 |
This theorem is referenced by: (None) |
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