A cobordism between links in thickened surfaces consists of a surface $ S and $3$-manifold $M $, with properly embedded M \times I $. We show that there exist such if $(S,M) is them which simple, then must be complex. That is, are cases low complexity the does not imply $3$-manifold. Specifically, we concordant concordance can only realised by passing through thickenings higher genus surfaces. ...

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...

Background: Infertility is defined as 1 year of unprotected intercourse without pregnancy. The main causes of infertility are as follows: male factor, Both mail and female, as well as unexplained etiologies. Tubal and peritoneal factors Aceount for 30%-40% of causes of female infertility. Tubal factors include damage and obstraction of the fallopian tube, usually associated with previous pelvic...

In this paper we are going to explain some of the problems we have found in our attempts to mechanize the Historical Dictionary (D.H.) of the Spanish language. Our experimental project is a collaboration of the Royal Spanish Academy (R.A.E.) and the Computer Center of the University of Madrid (CCVM). There are, indeed, many procedures for making concordances of a text, and those procedures are,...