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Mirrors > Home > MPE Home > Th. List > ioossicc | Structured version Visualization version Unicode version |
Description: An open interval is a subset of its closure. (Contributed by Paul Chapman, 18-Oct-2007.) |
Ref | Expression |
---|---|
ioossicc |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-ioo 12179 |
. 2
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2 | df-icc 12182 |
. 2
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3 | xrltle 11982 |
. 2
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4 | xrltle 11982 |
. 2
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5 | 1, 2, 3, 4 | ixxssixx 12189 |
1
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