zltnle - Intuitionistic Logic Explorer

	Intuitionistic Logic Explorer		< Previous Next > Nearby theorems
Mirrors > Home > ILE Home > Th. List > zltnle		GIF version

Theorem zltnle 9389

Description: 'Less than' expressed in terms of 'less than or equal to'. (Contributed by Jim Kingdon, 14-Mar-2020.)

**Assertion**
Ref	Expression
zltnle	⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴))

**Proof of Theorem zltnle**
Step	Hyp	Ref	Expression
1		zre 9347	. . . . 5 ⊢ (𝐵 ∈ ℤ → 𝐵 ∈ ℝ)
2		zre 9347	. . . . 5 ⊢ (𝐴 ∈ ℤ → 𝐴 ∈ ℝ)
3		lenlt 8119	. . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵))
4	1, 2, 3	syl2anr 290	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵))
5	4	biimpd 144	. . 3 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐵 ≤ 𝐴 → ¬ 𝐴 < 𝐵))
6	5	con2d 625	. 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 < 𝐵 → ¬ 𝐵 ≤ 𝐴))
7		ztri3or 9386	. . 3 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 < 𝐵 ∨ 𝐴 = 𝐵 ∨ 𝐵 < 𝐴))
8		ax-1 6	. . . . 5 ⊢ (𝐴 < 𝐵 → (¬ 𝐵 ≤ 𝐴 → 𝐴 < 𝐵))
9	8	a1i 9	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 < 𝐵 → (¬ 𝐵 ≤ 𝐴 → 𝐴 < 𝐵)))
10		eqcom 2198	. . . . . . . . 9 ⊢ (𝐴 = 𝐵 ↔ 𝐵 = 𝐴)
11		eqle 8135	. . . . . . . . 9 ⊢ ((𝐵 ∈ ℝ ∧ 𝐵 = 𝐴) → 𝐵 ≤ 𝐴)
12	10, 11	sylan2b 287	. . . . . . . 8 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 = 𝐵) → 𝐵 ≤ 𝐴)
13	12	ex 115	. . . . . . 7 ⊢ (𝐵 ∈ ℝ → (𝐴 = 𝐵 → 𝐵 ≤ 𝐴))
14	13	adantl 277	. . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ) → (𝐴 = 𝐵 → 𝐵 ≤ 𝐴))
15	1, 14	sylan2 286	. . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 = 𝐵 → 𝐵 ≤ 𝐴))
16		pm2.24 622	. . . . 5 ⊢ (𝐵 ≤ 𝐴 → (¬ 𝐵 ≤ 𝐴 → 𝐴 < 𝐵))
17	15, 16	syl6 33	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 = 𝐵 → (¬ 𝐵 ≤ 𝐴 → 𝐴 < 𝐵)))
18		ltle 8131	. . . . . 6 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (𝐵 < 𝐴 → 𝐵 ≤ 𝐴))
19	1, 2, 18	syl2anr 290	. . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐵 < 𝐴 → 𝐵 ≤ 𝐴))
20	19, 16	syl6 33	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐵 < 𝐴 → (¬ 𝐵 ≤ 𝐴 → 𝐴 < 𝐵)))
21	9, 17, 20	3jaod 1315	. . 3 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → ((𝐴 < 𝐵 ∨ 𝐴 = 𝐵 ∨ 𝐵 < 𝐴) → (¬ 𝐵 ≤ 𝐴 → 𝐴 < 𝐵)))
22	7, 21	mpd 13	. 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (¬ 𝐵 ≤ 𝐴 → 𝐴 < 𝐵))
23	6, 22	impbid 129	1 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴))

Colors of variables: wff set class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 104 ↔ wb 105 ∨ w3o 979 = wceq 1364 ∈ wcel 2167 class class class wbr 4034 ℝcr 7895 < clt 8078 ≤ cle 8079 ℤcz 9343

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-in1 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-sep 4152 ax-pow 4208 ax-pr 4243 ax-un 4469 ax-setind 4574 ax-cnex 7987 ax-resscn 7988 ax-1cn 7989 ax-1re 7990 ax-icn 7991 ax-addcl 7992 ax-addrcl 7993 ax-mulcl 7994 ax-addcom 7996 ax-addass 7998 ax-distr 8000 ax-i2m1 8001 ax-0lt1 8002 ax-0id 8004 ax-rnegex 8005 ax-cnre 8007 ax-pre-ltirr 8008 ax-pre-ltwlin 8009 ax-pre-lttrn 8010 ax-pre-ltadd 8012

This theorem depends on definitions: df-bi 117 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-nel 2463 df-ral 2480 df-rex 2481 df-reu 2482 df-rab 2484 df-v 2765 df-sbc 2990 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-uni 3841 df-int 3876 df-br 4035 df-opab 4096 df-id 4329 df-xp 4670 df-rel 4671 df-cnv 4672 df-co 4673 df-dm 4674 df-iota 5220 df-fun 5261 df-fv 5267 df-riota 5880 df-ov 5928 df-oprab 5929 df-mpo 5930 df-pnf 8080 df-mnf 8081 df-xr 8082 df-ltxr 8083 df-le 8084 df-sub 8216 df-neg 8217 df-inn 9008 df-n0 9267 df-z 9344

This theorem is referenced by: znnnlt1 9391 nn0n0n1ge2b 9422 eluzdc 9701 fzdcel 10132 fzn 10134 fzpreddisj 10163 fzp1disj 10172 fzneuz 10193 fznuz 10194 uznfz 10195 fzp1nel 10196 difelfznle 10227 nelfzo 10244 fzodisj 10271 exfzdc 10333 modfzo0difsn 10504 fzfig 10539 iseqf1olemqk 10616 exp3val 10650 facdiv 10847 bcval5 10872 zfz1isolemiso 10948 2zsupmax 11408 2zinfmin 11425 summodclem3 11562 fprodntrivap 11766 alzdvds 12036 fzm1ndvds 12038 fzo0dvdseq 12039 n2dvds1 12094 bitsfzolem 12136 bitsfzo 12137 dvdsbnd 12148 algcvgblem 12242 prmndvdsfaclt 12349 odzdvds 12439 pcprendvds 12484 pcdvdsb 12514 pc2dvds 12524 pcmpt 12537 pockthg 12551 prmunb 12556 1arith 12561 4sqlem11 12595 perfectlem2 15320 lgsdilem2 15361 lgsquadlem2 15403 uzdcinzz 15528

W3C validator