As a corollary of work of Ozsváth and Szabó, it is shown that the classical concordance group of algebraically slice knots has an infinite cyclic summand and in particular is not a divisible group. Let A denote the concordance group of algebraically slice knots, the kernel of Levine’s homomorphism φ : C → G, where C is the classical knot concordance group and G is Levine’s algebraic concordance...

Some concern had been shown regarding the limited availability of castor seed to satisfy rising yearning for its oil use in industrial and domestic applications. This growing demand calls refocus on backward integration order ensure sustained supply chain. study adopts a factorial analysis that involves Principal Component Analysis (PCA) Kendall’s Coefficient Concordance (KCC) as statistical pr...

Subject analysis of the potential of spontaneous combustion in coal layers with analytical and numerical methods has been always considered as a difficult task because of the complexity of the coal behavior and the number of factors influencing it. Empirical methods, due to accounting for certain and specific factors, have not accuracy and efficiency for all positions. The Rock Engineering Syst...

R topics documented: cindex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 coef.concreg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 concreg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 confint.concreg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

A continuous random vector (X,Y) uniquely determines a copula C : [0,1]2 → [0,1] such that when the distribution functions of X and Y are properly composed into C , the joint distribution function of (X,Y) results. A copula is said to be D4-invariant if its mass distribution is invariant with respect to the symmetries of the unit square. A D4-invariant copula leads naturally to a family of meas...