María Luisa Serrano

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The concept of "reference conditions" describes the benchmark against which current conditions are compared when assessing the status of water bodies. In this paper we focus on the establishment of reference conditions for European lakes according to a phytoplankton biomass indicator--the concentration of chlorophyll-a. A mostly spatial approach (selection(More)
A sign regular matrix is almost strictly sign regular if all its nontrivial minors of the same order have the same strict sign. These matrices form a subclass of sign regular matrices (matrices whose minors of the same order have the same sign). In this paper, the backward stability for almost strictly sign regular matrices is studied when Neville(More)
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