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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 0dig2pr01 | Structured version Visualization version GIF version | ||
| Description: The integers 0 and 1 correspond to their last bit. (Contributed by AV, 28-May-2010.) |
| Ref | Expression |
|---|---|
| 0dig2pr01 | ⊢ (𝑁 ∈ {0, 1} → (0(digit‘2)𝑁) = 𝑁) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elpri 4608 | . 2 ⊢ (𝑁 ∈ {0, 1} → (𝑁 = 0 ∨ 𝑁 = 1)) | |
| 2 | 2nn 12417 | . . . . 5 ⊢ 2 ∈ ℕ | |
| 3 | 0z 12705 | . . . . 5 ⊢ 0 ∈ ℤ | |
| 4 | dig0 49719 | . . . . 5 ⊢ ((2 ∈ ℕ ∧ 0 ∈ ℤ) → (0(digit‘2)0) = 0) | |
| 5 | 2, 3, 4 | mp2an 705 | . . . 4 ⊢ (0(digit‘2)0) = 0 |
| 6 | oveq2 7429 | . . . 4 ⊢ (𝑁 = 0 → (0(digit‘2)𝑁) = (0(digit‘2)0)) | |
| 7 | id 23 | . . . 4 ⊢ (𝑁 = 0 → 𝑁 = 0) | |
| 8 | 5, 6, 7 | 3eqtr4a 2822 | . . 3 ⊢ (𝑁 = 0 → (0(digit‘2)𝑁) = 𝑁) |
| 9 | 2z 12729 | . . . . 5 ⊢ 2 ∈ ℤ | |
| 10 | uzid 12981 | . . . . 5 ⊢ (2 ∈ ℤ → 2 ∈ (ℤ≥‘2)) | |
| 11 | 0dig1 49722 | . . . . 5 ⊢ (2 ∈ (ℤ≥‘2) → (0(digit‘2)1) = 1) | |
| 12 | 9, 10, 11 | mp2b 10 | . . . 4 ⊢ (0(digit‘2)1) = 1 |
| 13 | oveq2 7429 | . . . 4 ⊢ (𝑁 = 1 → (0(digit‘2)𝑁) = (0(digit‘2)1)) | |
| 14 | id 23 | . . . 4 ⊢ (𝑁 = 1 → 𝑁 = 1) | |
| 15 | 12, 13, 14 | 3eqtr4a 2822 | . . 3 ⊢ (𝑁 = 1 → (0(digit‘2)𝑁) = 𝑁) |
| 16 | 8, 15 | jaoi 871 | . 2 ⊢ ((𝑁 = 0 ∨ 𝑁 = 1) → (0(digit‘2)𝑁) = 𝑁) |
| 17 | 1, 16 | syl 18 | 1 ⊢ (𝑁 ∈ {0, 1} → (0(digit‘2)𝑁) = 𝑁) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∨ wo 861 = wceq 1570 ∈ wcel 2145 {cpr 4586 ‘cfv 6539 (class class class)co 7421 0cc0 11201 1c1 11202 ℕcn 12336 2c2 12398 ℤcz 12694 ℤ≥cuz 12966 digitcdig 49708 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7752 ax-cnex 11257 ax-resscn 11258 ax-1cn 11259 ax-icn 11260 ax-addcl 11261 ax-addrcl 11262 ax-mulcl 11263 ax-mulrcl 11264 ax-mulcom 11265 ax-addass 11266 ax-mulass 11267 ax-distr 11268 ax-i2m1 11269 ax-1ne0 11270 ax-1rid 11271 ax-rnegex 11272 ax-rrecex 11273 ax-cnre 11274 ax-pre-lttri 11275 ax-pre-lttrn 11276 ax-pre-ltadd 11277 ax-pre-mulgt0 11278 ax-pre-sup 11279 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3900 df-un 3902 df-in 3904 df-ss 3915 df-pss 4035 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6305 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6495 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-riota 7378 df-ov 7424 df-oprab 7425 df-mpo 7426 df-om 7879 df-1st 8002 df-2nd 8003 df-frecs 8300 df-wrecs 8331 df-recs 8380 df-rdg 8419 df-er 8718 df-en 8975 df-dom 8976 df-sdom 8977 df-sup 9435 df-inf 9436 df-pnf 11346 df-mnf 11347 df-xr 11348 df-ltxr 11349 df-le 11350 df-sub 11544 df-neg 11545 df-div 11975 df-nn 12337 df-2 12406 df-n0 12608 df-z 12695 df-uz 12967 df-rp 13122 df-ico 13483 df-fl 13933 df-mod 14011 df-seq 14146 df-exp 14206 df-dig 49709 |
| This theorem is used by: nn0sumshdiglemB 49733 nn0sumshdiglem2 49735 |
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