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Mirrors > Home > MPE Home > Th. List > syl5sseq | Structured version Visualization version Unicode version |
Description: Subclass transitivity deduction. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) |
Ref | Expression |
---|---|
syl5sseq.1 |
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syl5sseq.2 |
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Ref | Expression |
---|---|
syl5sseq |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | syl5sseq.2 |
. 2
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2 | syl5sseq.1 |
. 2
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3 | sseq2 3466 |
. . 3
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4 | 3 | biimpa 491 |
. 2
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5 | 1, 2, 4 | sylancl 673 |
1
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