Theorem iocgtlbd 45551

Description: An element of a left-open right-closed interval is larger than its lower bound. (Contributed by Glauco Siliprandi, 5-Feb-2022.)

Hypotheses

Ref	Expression
iocgtlbd.1	⊢ (𝜑 → 𝐴 ∈ ℝ*)
iocgtlbd.2	⊢ (𝜑 → 𝐵 ∈ ℝ*)
iocgtlbd.3	⊢ (𝜑 → 𝐶 ∈ (𝐴(,]𝐵))

Assertion

Ref	Expression
iocgtlbd	⊢ (𝜑 → 𝐴 < 𝐶)

Proof of Theorem iocgtlbd

Step	Hyp	Ref	Expression
1		iocgtlbd.1	. 2 ⊢ (𝜑 → 𝐴 ∈ ℝ*)
2		iocgtlbd.2	. 2 ⊢ (𝜑 → 𝐵 ∈ ℝ*)
3		iocgtlbd.3	. 2 ⊢ (𝜑 → 𝐶 ∈ (𝐴(,]𝐵))
4		iocgtlb 45484	. 2 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ (𝐴(,]𝐵)) → 𝐴 < 𝐶)
5	1, 2, 3, 4	syl3anc 1373	1 ⊢ (𝜑 → 𝐴 < 𝐶)

Syntax hints:   → wi 4   ∈ wcel 2109   class class class wbr 5095  (class class class)co 7353  ℝ^*cxr 11167   < clt 11168  (,]cioc 13267

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-sep 5238  ax-nul 5248  ax-pr 5374  ax-un 7675  ax-cnex 11084  ax-resscn 11085

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ral 3045  df-rex 3054  df-rab 3397  df-v 3440  df-sbc 3745  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4479  df-pw 4555  df-sn 4580  df-pr 4582  df-op 4586  df-uni 4862  df-br 5096  df-opab 5158  df-id 5518  df-xp 5629  df-rel 5630  df-cnv 5631  df-co 5632  df-dm 5633  df-iota 6442  df-fun 6488  df-fv 6494  df-ov 7356  df-oprab 7357  df-mpo 7358  df-xr 11172  df-ioc 13271

This theorem is referenced by:  xlimpnfvlem1  45818