We introduce two new characterizations of Meyer sets. A repetitive Delone set in R with finite local complexity is topologically conjugate to a Meyer set if and only if it has d linearly independent topological eigenvalues, which is if and only if it is topologically conjugate to a bundle over a d-torus with totally disconnected compact fiber and expansive canonical action. “Conjugate to” is a ...

Valeriana glechomifolia Meyer is a small herb 5}10 cm high, growing in South Brazil. The plant was collected in April, 1998 in Sa8 o JoseH dos Ausentes, RS, Brazil and identi"ed by M. Sobral (Curso de PoH s-Graduac7 a8 o em Cie( ncias Farmace( uticas da Universidade Federal do Rio Grande do Sul, Brazil). Voucher specimens (M. Sobral, 7733) are kept in the Herbarium of the Universidade Federal d...

This paper gives a complete primary decomposition of the first, that is, the smallest, Mayr-Meyer ideal, its radical, and the intersection of its minimal components. The particular membership problem which makes the Mayr-Meyer ideals’ complexity doubly exponential in the number of variables is here examined also for the radical and the intersection of the minimal components. It is proved that f...

This World of Words assignment was an exercise in enhanced lexical analysis and applied analytical thinking. Drawing upon the skills, insights, and research methods rehearsed over a series of short writing assignments, students were asked to compose a five-page analysis of a selected lexeme that examined its past and present histories, as well as its future possibilities. In “The ‘Feminine’ Ide...