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For a rank two root system and a pair of nonnegative integers, using only elementary com-binatorics we construct two posets. The constructions are uniform across the root systems We then form the dis-tributive lattices of order ideals of these posets. Corollary 5.4 gives elegant quotient-of-products expressions for the rank generating functions of these(More)
This case report involves an adolescent primigravida at term who was admitted with urinary complaints to the labor and delivery unit of a medical center. Within an hour, she suddenly began screaming and complaining of severe pain running from her anterior pelvis through her vagina and up her spine. Three days of very challenging co-management of the(More)
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