Tensor and scalar substitution

On Apr 12, 5:54 pm, Gc wrote:
On 12 huhti, 08:26, Koobee Wublee wrote:

a tensor is nothing but a multi-dimensional matrix. shrug

There are important differences. In physics tensor, like a vector,
often is a physical being. Matrix represents a linear transformation
with respect to a particular base and that`s it. With tensors you need
to consider how it changes with respect to change of base(yes, in the
classical pictures it stays the same even if it changes)

So, in engineering, for example, a tensor deals with stress level in a
structure can be treated as if it a matrix, but in GR’s case where the
tensor deals with the curvature of spacetime has magical properties.
It sounds like a myth to yours truly. Who can you fool? Only self-
styled physicists. shrug

This myth came from the misunderstanding of what a metric represents
as the myth can be brought into light in the following post.

http://groups.google.com/group/sci.p...61e49769?hl=en

shrug