How to weigh a star using a moon

How much does a Hamiltonian cycle weigh?

1. INTRODUCTION. A Hamiltonian cycle in a graph is a path in the graph which visits each vertex exactly once and returns to the starting vertex. Let í µí°¾ í µí±› be a weighted complete graph with í µí±› vertices. We define the weight of an edge as the square of the distance between two end points of the edge. The weight of a path í µí±ƒ is the sum of the weights of all edges in the path and de...

How Much Does a Matrix of Rank k Weigh?

Matrices with very few nonzero entries cannot have large rank. On the other hand matrices without any zero entries can have rank as low as 1. These simple observations lead us to our main question. For matrices over finite fields, what is the relationship between the rank of a matrix and the number of nonzero entries in the matrix? This question motivated a summer research project collaboration...

How to write a medical article?

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How to blow up a massive star

How to identify a Strange Star

It has recently been shown, that the emission of gravitational radiation due to r-mode instabilities in hot, young neutron stars severely limits the rotation period of these stars [1–6]. Within the first year, where the star cools to 10K, the star will spin down to a few per cent of the Kepler-limit [7] (the ultimate rotation frequency where the stellar equator “falls off”), corresponding to a ...