منابع مشابه
Sunflowers in Lattices
A Sunflower is a subset S of a lattice, with the property that the meet of any two elements in S coincides with the meet of all of S. The Sunflower Lemma of Erdös and Rado [2] asserts that a set of size at least 1 + k!(t − 1)k of elements of rank k in a Boolean Lattice contains a sunflower of size t. We develop counterparts of the Sunflower Lemma for distributive lattices, graphic matroids, and...
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Hybrid or "recombinational" speciation refers to the origin of a new homoploid species via hybridization between chromosomally or genetically divergent parental species. Theory predicts that this mode of speciation is punctuated, but there has been little empirical evidence to support this claim. Here, we test the hypothesis of rapid hybrid speciation by estimating the sizes of parental species...
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Safflower [Carthamus tinctorius (L.)] is a multipurpose oilseed crop grown mainly for getting high quality edible oil rich in polyunsaturated fatty acids. India is the largest producer of safflower in the world with 402,000 hectares area under it, producing about 206,000 tons of safflower seed annually [1]. But its use in India is limited mainly to oil extraction from seed and leftover cake as ...
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ژورنال
عنوان ژورنال: Journal of the American Society for Horticultural Science
سال: 2014
ISSN: 0003-1062,2327-9788
DOI: 10.21273/jashs.139.6.669