361,441 research outputs found
Manni Zhang, soprano and Anna Carl, piano, April 21, 2018
This is the concert program of the Manni Zhang, soprano and Anna Carl, piano performance on Saturday, April 21, 2018 at 8:00 p.m., at the Concert Hall, 855 Commonwealth Avenue. Works performed were La Promessa by Gioachino Rossini, Fiocca La Neve nu Pietro Cimara, Stornello by P. Cimara, Perchè dolce, caro bene by Stefano Donaudy, Ganymed Op. 19, No. 3 D. 544 by Franz Schubert, Liebhaber in allen Gestalten D. 558 by F. Schubert, Im Abendroth D. 799 by F. Schubert, Die Forelle Op. 32 D. 550 by F. Schubert, Vorrei spiegarvi, O Dio by Wolfgang Amadeus Mozart, Fêtes galantes by Claude Debussy, En Sourdine by C. Debussy, Fantoches by C. Debussy, Clair De Lune by C. Debussy, Love by Vittorio Giannini, Tell me, Oh blue blue Sky! by V. Giannini, Sing to My Heart a Song by V. Giannini, and Spring Nostalgia by Huang Zi. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund
Facet Formation in the Negative Quenched Kardar-Parisi-Zhang Equation
The quenched Kardar-Parisi-Zhang (QKPZ) equation with negative non-linear
term shows a first order pinning-depinning (PD) transition as the driving force
is varied. We study the substrate-tilt dependence of the dynamic transition
properties in 1+1 dimensions. At the PD transition, the pinned surfaces form a
facet with a characteristic slope as long as the substrate-tilt is
less than . When , the transition is discontinuous and the critical
value of the driving force is independent of , while the transition
is continuous and increases with when . We explain these
features from a pinning mechanism involving a localized pinning center and the
self-organized facet formation.Comment: 4 pages, source TeX file and 7 PS figures are tarred and compressed
via uufile
Efficient quantum protocols for XOR functions
We show that for any Boolean function f on {0,1}^n, the bounded-error quantum
communication complexity of XOR functions satisfies that
, where d is the F2-degree of f, and
.
This implies that the previous lower bound by Lee and Shraibman \cite{LS09} is tight
for f with low F2-degree. The result also confirms the quantum version of the
Log-rank Conjecture for low-degree XOR functions. In addition, we show that the
exact quantum communication complexity satisfies , where is the number of nonzero Fourier coefficients of
f. This matches the previous lower bound
by Buhrman and de Wolf \cite{BdW01} for low-degree XOR functions.Comment: 11 pages, no figur
On Real Solutions of the Equation Φ\u3csup\u3e\u3cem\u3et\u3c/em\u3e\u3c/sup\u3e (\u3cem\u3eA\u3c/em\u3e) = 1/\u3cem\u3en\u3c/em\u3e J\u3csub\u3e\u3cem\u3en\u3c/em\u3e\u3c/sub\u3e
For a class of n × n-matrices, we get related real solutions to the matrix equation Φt (A) = 1/n Jn by generalizing the approach of and applying the results of Zhang, Yang, and Cao [SIAM J. Matrix Anal. Appl., 21 (1999), pp. 642–645]. These solutions contain not only those obtained by Zhang, Yang, and Cao but also some which are neither diagonally nor permutation equivalent to those obtained by Zhang, Yang, and Cao. Therefore, the open problem proposed by Zhang, Yang, and Cao in the cited paper is solved
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