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Mirrors > Home > MPE Home > Th. List > crctcshwlkn0lem1 | Structured version Visualization version GIF version |
Description: Lemma for crctcshwlkn0 27601. (Contributed by AV, 13-Mar-2021.) |
Ref | Expression |
---|---|
crctcshwlkn0lem1 | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℕ) → ((𝐴 − 𝐵) + 1) ≤ 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | recn 10629 | . . . 4 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
2 | 1 | adantr 483 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℕ) → 𝐴 ∈ ℂ) |
3 | nncn 11648 | . . . 4 ⊢ (𝐵 ∈ ℕ → 𝐵 ∈ ℂ) | |
4 | 3 | adantl 484 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℕ) → 𝐵 ∈ ℂ) |
5 | 1cnd 10638 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℕ) → 1 ∈ ℂ) | |
6 | subsub 10918 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 1 ∈ ℂ) → (𝐴 − (𝐵 − 1)) = ((𝐴 − 𝐵) + 1)) | |
7 | 6 | eqcomd 2829 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝐴 − 𝐵) + 1) = (𝐴 − (𝐵 − 1))) |
8 | 2, 4, 5, 7 | syl3anc 1367 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℕ) → ((𝐴 − 𝐵) + 1) = (𝐴 − (𝐵 − 1))) |
9 | nnm1ge0 12053 | . . . 4 ⊢ (𝐵 ∈ ℕ → 0 ≤ (𝐵 − 1)) | |
10 | 9 | adantl 484 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℕ) → 0 ≤ (𝐵 − 1)) |
11 | nnre 11647 | . . . . 5 ⊢ (𝐵 ∈ ℕ → 𝐵 ∈ ℝ) | |
12 | peano2rem 10955 | . . . . 5 ⊢ (𝐵 ∈ ℝ → (𝐵 − 1) ∈ ℝ) | |
13 | 11, 12 | syl 17 | . . . 4 ⊢ (𝐵 ∈ ℕ → (𝐵 − 1) ∈ ℝ) |
14 | subge02 11158 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ (𝐵 − 1) ∈ ℝ) → (0 ≤ (𝐵 − 1) ↔ (𝐴 − (𝐵 − 1)) ≤ 𝐴)) | |
15 | 14 | bicomd 225 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ (𝐵 − 1) ∈ ℝ) → ((𝐴 − (𝐵 − 1)) ≤ 𝐴 ↔ 0 ≤ (𝐵 − 1))) |
16 | 13, 15 | sylan2 594 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℕ) → ((𝐴 − (𝐵 − 1)) ≤ 𝐴 ↔ 0 ≤ (𝐵 − 1))) |
17 | 10, 16 | mpbird 259 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℕ) → (𝐴 − (𝐵 − 1)) ≤ 𝐴) |
18 | 8, 17 | eqbrtrd 5090 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℕ) → ((𝐴 − 𝐵) + 1) ≤ 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 ∧ w3a 1083 = wceq 1537 ∈ wcel 2114 class class class wbr 5068 (class class class)co 7158 ℂcc 10537 ℝcr 10538 0cc0 10539 1c1 10540 + caddc 10542 ≤ cle 10678 − cmin 10872 ℕcn 11640 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-om 7583 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-er 8291 df-en 8512 df-dom 8513 df-sdom 8514 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-nn 11641 df-n0 11901 df-z 11985 |
This theorem is referenced by: crctcshwlkn0lem6 27595 crctcshwlkn0lem7 27596 |
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