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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 9379 | . 2 ⊢ ;𝐴𝐵 = (((9 + 1) · 𝐴) + 𝐵) | |
2 | 9p1e10 9380 | . . . 4 ⊢ (9 + 1) = ;10 | |
3 | 2 | oveq1i 5880 | . . 3 ⊢ ((9 + 1) · 𝐴) = (;10 · 𝐴) |
4 | 3 | oveq1i 5880 | . 2 ⊢ (((9 + 1) · 𝐴) + 𝐵) = ((;10 · 𝐴) + 𝐵) |
5 | 1, 4 | eqtri 2198 | 1 ⊢ ;𝐴𝐵 = ((;10 · 𝐴) + 𝐵) |
Colors of variables: wff set class |
Syntax hints: = wceq 1353 (class class class)co 5870 0cc0 7806 1c1 7807 + caddc 7809 · cmul 7811 9c9 8971 ;cdc 9378 |
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 ax-sep 4119 ax-cnex 7897 ax-resscn 7898 ax-1cn 7899 ax-1re 7900 ax-icn 7901 ax-addcl 7902 ax-addrcl 7903 ax-mulcl 7904 ax-mulcom 7907 ax-addass 7908 ax-mulass 7909 ax-distr 7910 ax-1rid 7913 ax-0id 7914 ax-cnre 7917 |
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-ral 2460 df-rex 2461 df-rab 2464 df-v 2739 df-un 3133 df-in 3135 df-ss 3142 df-sn 3598 df-pr 3599 df-op 3601 df-uni 3809 df-int 3844 df-br 4002 df-iota 5175 df-fv 5221 df-ov 5873 df-inn 8914 df-2 8972 df-3 8973 df-4 8974 df-5 8975 df-6 8976 df-7 8977 df-8 8978 df-9 8979 df-dec 9379 |
This theorem is referenced by: decnncl 9397 dec0u 9398 dec0h 9399 decnncl2 9401 declt 9405 decltc 9406 decsuc 9408 decle 9411 declti 9415 decsucc 9418 dec10p 9420 decma 9428 decmac 9429 decma2c 9430 decadd 9431 decaddc 9432 decsubi 9440 decmul1 9441 decmul1c 9442 decmul2c 9443 decmul10add 9446 5t5e25 9480 6t6e36 9485 8t6e48 9496 9t11e99 9507 3dec 10685 3dvdsdec 11860 |
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