El pensamiento lógico-matemático

This book presents conventions, mathematical concepts, definitions and applications central to the geometric modeling of solids, shells and wires (engineering jargon) embedded in 3D space. Currently, software is available for geometric modeling of technical or natural scenarios. However, the models built frequently fail in supporting the subsequent engineering computing and simulations. Only after repeated iterations and re-design, the models permit engineering / science simulations. This book endows the reader with the basic mathematical concepts needed to ensure that the geometric models...

The principal objective of the author when writing this book is to offer a book that the students will enjoy to read, at the same time learning concepts of algebra, for which brief sentences, clear explanations and lots of examples full of details are used. Various changes are included in this sixth edition: the topic of addition and subtraction of fractions has been improved, the introduction of solving equations with fractions, and they have added new examples and exercises.

Cuadernos que comprenden el currículo de Educación Primaria correspondiente a cada curso, pensados como material para reforzar aprendizajes no consolidados y mantener y ampliar los ya conseguidos. El presente cuaderno está pensado para 3.o de Primaria, con alumnos de edades comprendidas entre los 8 y los 9 años.

One of the risks during pregnancy, with high negative impact on both pregnant and fetus, is cardiovascular disease suffering. Early diagnosis and proper treatment of this pathology significantly reduces the risk for pregnant. This problem is characterized by the insufficient availability of experts with knowledge of medical specialties involved, making it difficult to both the diagnosis process and the selection of appropriate treatment. In addition, in the treatment of this problem, there are situations of indetermination, uncertainty, vagueness, and incomplete data, hence the need to create ...