<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-09-21T16:27:01Z</responseDate><request verb="GetRecord" identifier="oai:drum.lib.umd.edu:1903/9121" metadataPrefix="dim">https://api.drum.lib.umd.edu/server/oai/request</request><GetRecord><record><header><identifier>oai:drum.lib.umd.edu:1903/9121</identifier><datestamp>2016-03-29T06:59:55Z</datestamp><setSpec>com_1903_2261</setSpec><setSpec>com_1903_12</setSpec><setSpec>com_1903_2</setSpec><setSpec>col_1903_2793</setSpec><setSpec>col_1903_3</setSpec></header><metadata><dim:dim xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:doc="http://www.lyncode.com/xoai" xsi:schemaLocation="http://www.dspace.org/xmlns/dspace/dim http://www.dspace.org/schema/dim.xsd">
   <dim:field mdschema="dc" element="contributor" qualifier="advisor" lang="en_US">Millson, John J</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="author" lang="en_US">Manon, Christopher Allen</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="publisher" lang="en_US">Digital Repository at the University of Maryland</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="publisher" lang="en_US">University of Maryland (College Park, Md.)</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="department" lang="en_US">Mathematics</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="accessioned">2009-07-02T05:35:25Z</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="available">2009-07-02T05:35:25Z</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="issued" lang="en_US">2009</dim:field>
   <dim:field mdschema="dc" element="identifier" qualifier="uri">http://hdl.handle.net/1903/9121</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="abstract" lang="en_US">We study presentations for subalgebras of

invariants of the coordinate algebras of

binary symmetric models of phylogenetic 

trees studied by Buczynska and  Wisniewski. These

algebras arise as toric degenerations of

projective coordinate rings of weight varieties 

of the Grassmannian of two planes associated to the 

Pl\"ucker embedding, 

and as toric degenerations of rings of invariants of

Cox-Nagata rings.</dim:field>
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   <dim:field mdschema="dc" element="language" qualifier="iso">en_US</dim:field>
   <dim:field mdschema="dc" element="title" lang="en_US">Presentations of Semigroup Algebras of Weighted Trees</dim:field>
   <dim:field mdschema="dc" element="type" lang="en_US">Dissertation</dim:field>
   <dim:field mdschema="dc" element="subject" qualifier="pqcontrolled" lang="en_US">Mathematics</dim:field>
   <dim:field mdschema="dc" element="subject" qualifier="pquncontrolled" lang="en_US">Moduli</dim:field>
   <dim:field mdschema="dc" element="subject" qualifier="pquncontrolled" lang="en_US">Phylogenetics</dim:field>
   <dim:field mdschema="dc" element="subject" qualifier="pquncontrolled" lang="en_US">Polytope</dim:field>
   <dim:field mdschema="dc" element="subject" qualifier="pquncontrolled" lang="en_US">Toric Variety</dim:field>
   <dim:field mdschema="others" element="access-status">open.access</dim:field>
</dim:dim>
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