Displaying similar documents to “Precise lower bound for the number of edges of minor weight in planar maps”

Note on k -chromatic graphs

Dănuţ Marcu (1994)

Mathematica Bohemica


In this paper we characterize k -chromatic graphs without isolated vertices and connected k -chromatic graphs having a minimal number of edges.

Weight minimization of an elastic plate with a unilateral inner obstacle by a mixed finite element method

Ivan Hlaváček (1994)

Applications of Mathematics


Unilateral deflection problem of a clamped plate above a rigid inner obstacle is considered. The variable thickness of the plate is to be optimized to reach minimal weight under some constraints for maximal stresses. Since the constraints are expressed in terms of the bending moments only, Herrmann-Hellan finite element scheme is employed. The existence of an optimal thickness is proved and some convergence analysis for approximate penalized optimal design problem is presented. ...