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Mirrors > Home > MPE Home > Th. List > decex | Structured version Visualization version GIF version |
Description: A decimal number is a set. (Contributed by Mario Carneiro, 17-Apr-2015.) (Revised by AV, 6-Sep-2021.) |
Ref | Expression |
---|---|
decex | ⊢ ;𝐴𝐵 ∈ V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-dec 12093 | . 2 ⊢ ;𝐴𝐵 = (((9 + 1) · 𝐴) + 𝐵) | |
2 | 1 | ovexi 7184 | 1 ⊢ ;𝐴𝐵 ∈ V |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2110 Vcvv 3494 (class class class)co 7150 1c1 10532 + caddc 10534 · cmul 10536 9c9 11693 ;cdc 12092 |
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 ax-nul 5202 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-v 3496 df-sbc 3772 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-sn 4561 df-pr 4563 df-uni 4832 df-iota 6308 df-fv 6357 df-ov 7153 df-dec 12093 |
This theorem is referenced by: nfermltl2rev 43902 |
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