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Theorem pltle 18425

Description: "Less than" implies "less than or equal to". (pssss 4049 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 18424	. . 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 2957 class class class wbr 5107 ‘cfv 6537 lecple 17355 ltcplt 18402

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 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pr 5402

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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-mpt 5191 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-iota 6493 df-fun 6539 df-fv 6545 df-plt 18422

This theorem is used by: pleval2 18429 pltnlt 18432 pltn2lp 18433 plttr 18434 pospo 18437 ogrpaddlt 20271 orngsqr 21038 ornglmullt 21041 orngrmullt 21042 isarchi3 33635 archirngz 33637 archiabllem2a 33642 atnlt 40194 cvlcvr1 40220 hlrelat 40283 hlrelat3 40293 cvratlem 40302 atltcvr 40316 atlelt 40319 llnnlt 40404 lplnnle2at 40422 lplnnlt 40446 lvolnle3at 40463 lvolnltN 40499 cdlemblem 40674 cdlemb 40675 lhpexle1 40889

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