The d'Alembertian is a linear second order differential operator, typically in four independant variables. The time-independant version (in three independent (space) variables is called the Laplacian operator. When it's action on a function or vector vanishes, the resulting equation is called the wave equation (or Laplace's equation). When it's action is identified with a non-zero function (or vector function) the resulting equation is called Poisson's equation. This equation is fundamental to and of great importance in field theory. The focus of this tutorial is to demonstrate that when acting on a four-vector, the d'alembertian may be factored into two 4x4 differential matrices. http://wims.unice.fr/wims/wims.cgi http://wims.unice.fr/wims/wims.cgi?session=LB7615B1DA.2&+lang=en&+module=tool%2Flinear%2Fmatmult.en https://sites.google.com/site/themathematicalnatureofreality/ https://sites.google.com/site/themathematicalnatureofreality/config/pagetemplates/books
Sign up free http:/*****ly/HelpOutFree Tsunami hits japan after a earthquake hits the north of the country first. Then make a big wave and destroys everything in it's path. Tsunami warnings have been now issued for Japan, Russia, Marcus Island and the Northern Marianas. Tsunami warnings have also been issued for Guam, Taiwan, the Philippines, Indonesia, Hawaii
http://soulboater.blogspot.com presents freestyle bigwave kayaking on the Mega-Aalto (Wave) on the Torniojoki between Finland and Sweden in the spring of 2010. Distributed by Tubemogul.
Be Veg. Go Green. 2 Save the Planet.(吃素、環保、來救地球)for more details, Please visit http://www.SupremeMasterTV.com As of December 26, at least five people had succumbed to a cold snap across the north that caused thermomenters to drop below zero degrees Celsius...etc.截至12/26整個北部地區的寒流,讓氣溫降到攝氏零度以下,5人因此喪生...等。
"A life on the ocean wave, a home on the rolling deep. Where under the waters save, New wells with treasures deep".
Well, worse things have happened at sea....