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Mirrors > Home > ILE Home > Th. List > dfdec10 | GIF version |
Description: Version of the definition of the "decimal constructor" using ;10 instead of the symbol 10. Of course, this statement cannot be used as definition, because it uses the "decimal constructor". (Contributed by AV, 1-Aug-2021.) |
Ref | Expression |
---|---|
dfdec10 | ⊢ ;𝐴𝐵 = ((;10 · 𝐴) + 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-dec 8478 | . 2 ⊢ ;𝐴𝐵 = (((9 + 1) · 𝐴) + 𝐵) | |
2 | 9p1e10 8479 | . . . 4 ⊢ (9 + 1) = ;10 | |
3 | 2 | oveq1i 5542 | . . 3 ⊢ ((9 + 1) · 𝐴) = (;10 · 𝐴) |
4 | 3 | oveq1i 5542 | . 2 ⊢ (((9 + 1) · 𝐴) + 𝐵) = ((;10 · 𝐴) + 𝐵) |
5 | 1, 4 | eqtri 2101 | 1 ⊢ ;𝐴𝐵 = ((;10 · 𝐴) + 𝐵) |
Colors of variables: wff set class |
Syntax hints: = wceq 1284 (class class class)co 5532 0cc0 6981 1c1 6982 + caddc 6984 · cmul 6986 9c9 8096 ;cdc 8477 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-sep 3896 ax-cnex 7067 ax-resscn 7068 ax-1cn 7069 ax-1re 7070 ax-icn 7071 ax-addcl 7072 ax-addrcl 7073 ax-mulcl 7074 ax-mulcom 7077 ax-addass 7078 ax-mulass 7079 ax-distr 7080 ax-1rid 7083 ax-0id 7084 ax-cnre 7087 |
This theorem depends on definitions: df-bi 115 df-3an 921 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ral 2353 df-rex 2354 df-rab 2357 df-v 2603 df-un 2977 df-in 2979 df-ss 2986 df-sn 3404 df-pr 3405 df-op 3407 df-uni 3602 df-int 3637 df-br 3786 df-iota 4887 df-fv 4930 df-ov 5535 df-inn 8040 df-2 8098 df-3 8099 df-4 8100 df-5 8101 df-6 8102 df-7 8103 df-8 8104 df-9 8105 df-dec 8478 |
This theorem is referenced by: decnncl 8496 dec0u 8497 dec0h 8498 decnncl2 8500 declt 8504 decltc 8505 decsuc 8507 decle 8510 declti 8514 decsucc 8517 dec10p 8519 decma 8527 decmac 8528 decma2c 8529 decadd 8530 decaddc 8531 decsubi 8539 decmul1 8540 decmul1c 8541 decmul2c 8542 decmul10add 8545 5t5e25 8579 6t6e36 8584 8t6e48 8595 9t11e99 8606 3dec 9642 3dvdsdec 10264 |
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