The concept "mass" is the topic of the paper

*REST MASS AND RELATIVISTIC MASS*, published on

www.wbabin.net/astro/acke3.pdf as a comment upon the "theory of informatons".

In that paper is shown that:

1. The rate at which an object - that whether or not is at rest relative to an inertial reference frame

*O* - is emitting informatons in the space linked to

*O* *is determined by its rest mass if time is measured by a standard clock in* *O*.

2. That rate

*is determined by its relativistic mass if time is measured by a standard clock in the "eigen inertial frame"* *O'* of the object.

*O'* is the inertial reference frame that, at the considered moment, moves relative to

*O* at the same velocity as the object.

3. The linear momentum (vector

*p*) of a point mass in an inertial reference frame is determined by its relativistic mass.

4. The amount of energy represented by a point mass in an inertial reference frame is the product of its relativistic mass and the square of the speed of light.

5. The law of conservation of information is also valid when the included masses (or charges) are moving (

*integral form of Maxwell's first law*), or when the mass (or charge) density is time dependent (

*differential form of Maxwell's first law*).

**NOTES** - The "theory of informatons" is presented on this forum under the topic "

**gravitation and electromagnetism**". An introduction is published on

www.wbabin.net/astro/acke2.pdf .

- More information can be found on:

www.antoineacke.net .