منابع مشابه
Konrad Schäfer , Wilfried Hermes , Ute Ch . Rodewald , Rolf - Dieter Hoffmann
The antimonides RE2Ir3Sb4 (RE = La, Ce, Pr, Nd) were synthesized by arc-melting of the elements and subsequent annealing or via high-frequency melting. The samples were characterized by X-ray powder diffraction, and the four structures were refined from single-crystal X-ray diffraction data: Pr2Ir3Sb4 type, Pnma, Z = 4, a = 1621.9(2), b = 458.60(8), c = 1099.8(1) pm, wR2 = 0.036, 1558 F2 values...
متن کاملWilfried Imrich
Let M(m; n) be the complexity of checking whether a graph G with m edges and n vertices is a median graph. We show that the complexity of checking whether G is triangle-free is at most M(m; m). Conversely, we prove that the complexity of checking whether a given graph is a median graph is at most O(m log n)+T(m log n; n), where T(m; n) is the complexity of nding all triangles of the graph. This...
متن کاملGödel on computability * Wilfried
The identification of an informal concept of “effective calculability”with a rigorous mathematical notion like “recursiveness” or “Turingcomputability” is still viewed as problematic, and I think rightly so. I analyzethree different and conflicting perspectives Gödel articulated in the three decadesfrom 1934 to 1964. The significant shifts in Gödel's position underline thedi...
متن کاملPeter Schäfer : Mirror of His Beauty
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متن کاملWilfried Brauer (1937-2014) in memoriam
At the end of February this year we received the sad tidings of the passing of Wilfried Brauer. Although not quite unexpected, the tidings still left us with a feeling of sorrow and longing. We had lost a close friend, a remarkable scientist and an influential administrator. Wilfried was one of the early pioneers of theoretical computer science in Europe. He was active in the founding stages of...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2006
ISSN: 1742-6596
DOI: 10.1088/1742-6596/35/1/e02