Vatersehnsucht. Botho Strauß erzählt sich seine Herkunft

Botho Strauß (b. 1944), German playwright, novelist and essayist, devotes his book Herkunft [Origin] (2014) to a subtle portrait of his slightly underestimated father, who died in 1971. This sample of prose is typical of Strauss as it encompasses meditative descriptions, disquisitions, aphorisms and narrative fragments. This narration contains numerous biographical details about his father, as well as his mother and the writer himself, and it tells us a lot about his youth and cultural maturation. Strauss’ hometown, Bad Ems, provides a certain topographic point of reference here. This is a highly personal and emotional text which simultaneously exhibits all esthetic properties that characterize Strauss’ style. This text is also about the way different sensory stimuli incite our memory and how difficult it is to find a literary form adequate to reconstruct memory.Botho Strauß (b. 1944), German playwright, novelist and essayist, devotes his book Herkunft [Origin] (2014) to a subtle portrait of his slightly underestimated father, who died in 1971. This sample of prose is typical of Strauss as it encompasses meditative descriptions, disquisitions, aphorisms and narrative fragments. This narration contains numerous biographical details about his father, as well as his mother and the writer himself, and it tells us a lot about his youth and cultural maturation. Strauss’ hometown, Bad Ems, provides a certain topographic point of reference here. This is a highly personal and emotional text which simultaneously exhibits all esthetic properties that characterize Strauss’ style. This text is also about the way different sensory stimuli incite our memory and how difficult it is to find a literary form adequate to reconstruct memory.Botho Strauß (b. 1944), German playwright, novelist and essayist, devotes his book Herkunft [Origin] (2014) to a subtle portrait of his slightly underestimated father, who died in 1971. This sample of prose is typical of Strauss as it encompasses meditative descriptions, disquisitions, aphorisms and narrative fragments. This narration contains numerous biographical details about his father, as well as his mother and the writer himself, and it tells us a lot about his youth and cultural maturation. Strauss’ hometown, Bad Ems, provides a certain topographic point of reference here. This is a highly personal and emotional text which simultaneously exhibits all esthetic properties that characterize Strauss’ style. This text is also about the way different sensory stimuli incite our memory and how difficult it is to find a literary form adequate to reconstruct memory

Isomorphisms and strictly singular operators in mixed Tsirelson spaces

We study the family of isomorphisms and strictly singular operators in mixed Tsirelson spaces and their modified versions setting. We show sequential minimality of modified mixed Tsirelson spaces T_M[(\mc{S}_n,\theta_n)] satisfying some regularity conditions and present results on existence of strictly singular non-compact operators on subspaces of mixed Tsirelson spaces defined by the families (\mc{A}_n)_n and (\mc{S}_n)_n.Comment: 29 pages, no figure

Explicit constructions of RIP matrices and related problems

We give a new explicit construction of $n\times N$ matrices satisfying the Restricted Isometry Property (RIP). Namely, for some c>0, large N and any n satisfying N^{1-c} < n < N, we construct RIP matrices of order k^{1/2+c}. This overcomes the natural barrier k=O(n^{1/2}) for proofs based on small coherence, which are used in all previous explicit constructions of RIP matrices. Key ingredients in our proof are new estimates for sumsets in product sets and for exponential sums with the products of sets possessing special additive structure. We also give a construction of sets of n complex numbers whose k-th moments are uniformly small for 1\le k\le N (Turan's power sum problem), which improves upon known explicit constructions when (\log N)^{1+o(1)} \le n\le (\log N)^{4+o(1)}. This latter construction produces elementary explicit examples of n by N matrices that satisfy RIP and whose columns constitute a new spherical code; for those problems the parameters closely match those of existing constructions in the range (\log N)^{1+o(1)} \le n\le (\log N)^{5/2+o(1)}.Comment: v3. Minor correction