We discuss a recent necessary and sufficient condition for Melin's inequality for a class of systems of pseudodifferential operators.
@article{JEDP_2001____A1_0, author = {Brummelhuis, Raymond}, title = {Generalizations of {Melin's} inequality to systems}, journal = {Journ\'ees \'equations aux d\'eriv\'ees partielles}, eid = {1}, pages = {1--8}, publisher = {Universit\'e de Nantes}, year = {2001}, doi = {10.5802/jedp.585}, mrnumber = {1843402}, zbl = {1054.35153}, language = {en}, url = {http://www.numdam.org/articles/10.5802/jedp.585/} }
Brummelhuis, Raymond. Generalizations of Melin's inequality to systems. Journées équations aux dérivées partielles (2001), article no. 1, 8 p. doi : 10.5802/jedp.585. http://www.numdam.org/articles/10.5802/jedp.585/
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