When products of projections diverge
نویسندگان
چکیده
منابع مشابه
Commentary When developmental pathways diverge
We think of development as a process of inexorable progressive change by which a single cell is transformed into a complex multicellular organism, made up of many tissues and organs, each with a distinctive structure and function. In any given species, the progression from the simple to the complex occurs in an orderly fashion that is repeated with little or no variation in millions of individu...
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The availability of sequences from the mtDNA hypervariable region I and II of a specimen of the Neanderthal,1,2 Homo neanderthalensis, permits estimation of the time of divergence of Neanderthals and modern humans. Based on substitution rates derived from comparison of human and chimpanzee, Krings et al. provided an estimate of 550–690 KY1 and 317–741 KY2 before present for the split between th...
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متن کاملProducts of Orthogonal Projections
We give a characterization of operators on a separable Hilbert space of norm less than one that can be represented as products of orthogonal projections and give an estimate on the number of factors. We also describe the norm closure of the set of all products of orthogonal projections.
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ژورنال
عنوان ژورنال: Journal of the London Mathematical Society
سال: 2020
ISSN: 0024-6107,1469-7750
DOI: 10.1112/jlms.12322