The study of tensor calculus is often seen as a daunting hurdle for undergraduates, as it requires a shift from standard vector calculus to more abstract multi-linear algebra. The Schaum's Outline of Tensor Calculus
El Cálculo Tensorial de Schaum es de esos libros que merecen estar en tu disco duro aunque tengas el físico. Si encuentras una versión escaneada de la "1 nueva edición" con buena calidad, no lo dudes.
Los PDFs gratuitos que circulan en páginas como "libros-pdf-gratis.net" suelen ser de la primera edición de 1959, con errores y mala calidad de escaneo. Evítalos si buscas "better".
Jingle Bells is one of the best known and loved Christmas songs in the world. But this Christmas song was originally written for... Thanksgiving!
The song was written by James Lord Pierpont and was copyrighted on September 16, 1857 with the title One Horse Open Sleigh.
Jingle Bells was the first song ever played in outer space. On December 16, 1965, the Gemini 6 crew played it on a harmonica and bells.
















You have to make him quickly
As delicious as can be
He won’t stick around for long
Once he's been out in the sun
I fall from the sky
Happy to dance and fly
I pile up so high
So white and dry
When it's deep in winter
You will find it pleasing
To have these on your hands
So that they're not freezing
Our printables are in pdf format. To download them, you will need Adobe Acrobat Reader.