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Theorem pltle 18485

Description: "Less than" implies "less than or equal to". (pssss 4046 analog.) (Contributed by NM, 4-Dec-2011.)

**Hypotheses**
Ref	Expression
pltval.l	⊢ ≤ = (le‘𝐾)
pltval.s	⊢ < = (lt‘𝐾)

**Assertion**
Ref	Expression
pltle	⊢ ((𝐾 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐶) → (𝑋 < 𝑌 → 𝑋 ≤ 𝑌))

**Proof of Theorem pltle**
Step	Hyp	Ref	Expression
1		pltval.l	. . . 4 ⊢ ≤ = (le‘𝐾)
2		pltval.s	. . . 4 ⊢ < = (lt‘𝐾)
3	1, 2	pltval 18484	. . 3 ⊢ ((𝐾 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐶) → (𝑋 < 𝑌 ↔ (𝑋 ≤ 𝑌 ∧ 𝑋 ≠ 𝑌)))
4	3	simprbda 504	. 2 ⊢ (((𝐾 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐶) ∧ 𝑋 < 𝑌) → 𝑋 ≤ 𝑌)
5	4	ex 418	1 ⊢ ((𝐾 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐶) → (𝑋 < 𝑌 → 𝑋 ≤ 𝑌))

Colors of variables: wff setvar class

This proof depends on syntax axioms: → wi 4 ∧ w3a 1103 = wceq 1570 ∈ wcel 2145 ≠ wne 2956 class class class wbr 5103 ‘cfv 6531 lecple 17415 ltcplt 18462

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-sep 5249 ax-nul 5260 ax-pr 5391

This proof depends on definitions: df-bi 210 df-an 402 df-or 862 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-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-iota 6487 df-fun 6533 df-fv 6539 df-plt 18482

This theorem is used by: pleval2 18489 pltnlt 18492 pltn2lp 18493 plttr 18494 pospo 18497 ogrpaddlt 20332 orngsqr 21103 ornglmullt 21106 orngrmullt 21107 isarchi3 33730 archirngz 33732 archiabllem2a 33737 atnlt 40338 cvlcvr1 40364 hlrelat 40427 hlrelat3 40437 cvratlem 40446 atltcvr 40460 atlelt 40463 llnnlt 40548 lplnnle2at 40566 lplnnlt 40590 lvolnle3at 40607 lvolnltN 40643 cdlemblem 40818 cdlemb 40819 lhpexle1 41033

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