{"id":{"repo_id":"u-pacific","oai_identifier":"oai:scholarlycommons.pacific.edu:uop_etds-2805"},"canonical_url":"https://search.dev.ndltd.org/etd/u-pacific/oai:scholarlycommons.pacific.edu:uop_etds-2805","repository":{"repo_id":"u-pacific","name":"University of the Pacific","base_url":"https://scholarlycommons.pacific.edu/do/oai/"},"display":{"title":"MANDO : a computer program for symbolic manipulation of differential operators generating continuous transformations","abstract":"<p>The program MANDO efficiently performs computations involving pairs of operators, a single operator, and operators applied to functions, saving time and cost over pencil-·and-paper methods.</p> <p>A versatile but compact data structure, defined under SPIT-BOL's facility for creation of datatypes, contains the operators (and functions) and provides a means for systematically referencing their relevant parts.</p> <p>On input, functions and operators are written in a restricted but natural string format, for which the program can readily convert them to the internal data structure.</p> <p>Central to the method of operation of the derivative routine is its ability to differentiate a function written as a string. This allows for a certain compactness in the internal form. To counteract the relative slowness of string processing in the derivative routine, the program keeps a table of derivatives repeated during the processing . The table is checked for the presence of the function and its derivative before the derivative sequence is applied.</p> <p>Some simplification is performed. The simplification relies on the ordering sequence, followed by a sequence which cancels or combines terms that are alike, except, in general, for numerical multipliers.</p>","abstract_html":"&lt;p&gt;The program MANDO efficiently performs computations involving pairs of operators, a single operator, and operators applied to functions, saving time and cost over pencil-·and-paper methods.&lt;/p&gt; &lt;p&gt;A versatile but compact data structure, defined under SPIT-BOL&#x27;s facility for creation of datatypes, contains the operators (and functions) and provides a means for systematically referencing their relevant parts.&lt;/p&gt; &lt;p&gt;On input, functions and operators are written in a restricted but natural string format, for which the program can readily convert them to the internal data structure.&lt;/p&gt; &lt;p&gt;Central to the method of operation of the derivative routine is its ability to differentiate a function written as a string. This allows for a certain compactness in the internal form. To counteract the relative slowness of string processing in the derivative routine, the program keeps a table of derivatives repeated during the processing . The table is checked for the presence of the function and its derivative before the derivative sequence is applied.&lt;/p&gt; &lt;p&gt;Some simplification is performed. The simplification relies on the ordering sequence, followed by a sequence which cancels or combines terms that are alike, except, in general, for numerical multipliers.&lt;/p&gt;","abstract_has_math":false,"creators":["Davison, David Kenneth"],"institution":null,"degree_name":"Master of Science (M.S.)","degree_level":"Thesis","degree_discipline":"Graduate Studies","degree_department":null,"school":null,"contributors":["Carl E. 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