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returns true iff p lies on c. | ||
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returns true iff p lies on l. | ||
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returns true iff p lies on r. | ||
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returns true iff p lies on s. | ||
|
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returns true iff p lies on pl. | ||
|
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returns true iff l lies on pl. | ||
|
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returns true iff c lies on pl. | ||
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returns true iff c lies on s. | ||
|
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returns true iff c lies on s. | ||
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returns true iff p lies on t. |