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Mirrors > Home > MPE Home > Th. List > iccssxr | Structured version Visualization version GIF version |
Description: A closed interval is a set of extended reals. (Contributed by FL, 28-Jul-2008.) (Revised by Mario Carneiro, 4-Jul-2014.) |
Ref | Expression |
---|---|
iccssxr | ⊢ (𝐴[,]𝐵) ⊆ ℝ* |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-icc 13086 | . 2 ⊢ [,] = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑧 ∈ ℝ* ∣ (𝑥 ≤ 𝑧 ∧ 𝑧 ≤ 𝑦)}) | |
2 | 1 | ixxssxr 13091 | 1 ⊢ (𝐴[,]𝐵) ⊆ ℝ* |
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