SI kilogram="mass" matter definition.

Tom [He between his error-bars] Roberts wrote: kolt wrote:
Matter is described as some physical substance that has mass and
occupies space.
-=-
In some contexts, such as QED and the standard model, photons are
quite different from matter, because they are different fundamental
particles.
The primary difference is that photons are Bosons and anything we
would call "matter" includes at least some Fermions.
-=-
and the -=- radiation they represent are quite distinct from
matter.

In another context, GR, photons are not used and the
electromagnetic fields and radiation they represent are often
lumped together with everything that has a nonzero energy-momentum
tensor and called "matter" (as distinct from "vacuum", which has a
zero energy-momentum tensor) -- note this is really a pun on that
word. -=-
-- one does need a scorecard (obtained via study).
-=-
We cannot describe _anything_ without a theory, and that will
have to do until and unless we discover/construct a new and better
theory describing them.

Tom [He between his error-bars] Roberts

$$ "OTHERwise in-vacu" error-bars.
$$ RELATiViSTiC mass m (ABSORBED ..as measured), is scalar = E/c^2.
$$ RELATiViSTiC mass has MOST to do with "in vacu" Ambient RESiDUE.
$$ RELATiViSTiC gamma = Sqrt(1 - 1/Ambiance^2) "OTHERwise in-vacu".
$$
$$ Say WHAT about GR SPACE co-ordinate SYSTEMs of a POiNT on a line:
$$ The co-ordinate systen isN'T the GEOMETRY, the GR POiNT is ..duh.
$$ The only PRiOR geometry GR had (..for a POiNT at the end of it's
$$ GR-WORLD-line) was CUT OFF, having DECLARED "No PRiOR geometry".
$$
[Gamma = Sqrt{1-(Amu's/(Residual Ambience COUNT in "vacu")^2}].
[There's No mass, No matter and No momentum, in GEOMETRY, duh].
POiNT is, the co-ordinate system isN'T GR GEOMETRY, a POiNT is.
A GR POiNT-surface is so BiG ..it's locally FLAT at-a-DiSTANCE.
FAQ - (the heretic's version).
$$ You are "OFF-the-WALL (cracked)" if you disagree with THiS note.
| If the object is *at rest* in your frame: E = m*c^2.
$$ If the object is *at rest* in your frame: m = E/c^2.
$$ ALL Non-GR is reverted BACK to a GENERAL-REST-"mass" definition.
$$ [Any QUANTiTY that CAN be expressed in SI "kilograms" = "mass"].
ANY flux formula. Message-ID: .
SI kilogram="mass" matter definition.
$$ You're a VERY cracked-pot.```Brian A M Stuckless, Ph.T (Tivity).