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Mirrors > Home > MPE Home > Th. List > Mathboxes > dp2eq1 | Structured version Visualization version GIF version |
Description: Equality theorem for the decimal expansion constructor. (Contributed by David A. Wheeler, 15-May-2015.) |
Ref | Expression |
---|---|
dp2eq1 | ⊢ (𝐴 = 𝐵 → _𝐴𝐶 = _𝐵𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oveq1 7157 | . 2 ⊢ (𝐴 = 𝐵 → (𝐴 + (𝐶 / ;10)) = (𝐵 + (𝐶 / ;10))) | |
2 | df-dp2 30543 | . 2 ⊢ _𝐴𝐶 = (𝐴 + (𝐶 / ;10)) | |
3 | df-dp2 30543 | . 2 ⊢ _𝐵𝐶 = (𝐵 + (𝐶 / ;10)) | |
4 | 1, 2, 3 | 3eqtr4g 2881 | 1 ⊢ (𝐴 = 𝐵 → _𝐴𝐶 = _𝐵𝐶) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1533 (class class class)co 7150 0cc0 10531 1c1 10532 + caddc 10534 / cdiv 11291 ;cdc 12092 _cdp2 30542 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-rex 3144 df-rab 3147 df-v 3496 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-sn 4561 df-pr 4563 df-op 4567 df-uni 4832 df-br 5059 df-iota 6308 df-fv 6357 df-ov 7153 df-dp2 30543 |
This theorem is referenced by: dp2eq1i 30546 |
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