Progress reports at scientific collections

We prove that if A is a subset of at least cn1/2 elements of {1, . . . , n}, where c is a sufficiently large constant, then the collection of subset sums of A contains an arithmetic progression of length n. As an application, we confirm a long standing conjecture of Erd˝s and Folkman on complete sequences. o

36p noel_noel 17-01-2013 47 5   Download

Collection of research reports best university in 2007 honored the author: 12. Truong Van Nam, Nguyen Xuan Dung, study the effect of substituents on the properties of aniline by approximate methods AM1 quantum ... Quantum mechanics is one of the fundamental theory of physics. Quantum mechanics is an extension and supplement of Newtonian mechanics (also known as classical mechanics). It is the basis of many other disciplines of physics and chemistry as solid state physics, chemistry quantum particle physics.

6p phalinh14 07-08-2011 82 2   Download

Geometry is a branch of mathematics related research space. Using experience, or perhaps by intuition, it is recognized by the space fundamental characteristics, the geometric axioms called the system. Axiomatic system including the original concept is not defined and the axioms (also known as the proposition) does not prove a relationship defined between the concepts.

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Microorganisms are single-celled organisms are small, not observed with the naked eye but to use a microscope. The term microbial does not correspond to any taxon in scientific classification. It includes viruses, bacteria, archaea, fungi, microscopic algae, protozoa. Etc.

12p phalinh14 07-08-2011 68 7   Download