This principle is needed for a theory on the quantization of spacetime at the infinitesimal region.(adsbygoogle = window.adsbygoogle || []).push({});

The properties of this principle are:

1. Top-right-front 2. Top-left-front 3. Top-right-back 4. Top-left-back

5. Down-right-front 6. Down-left-front 7. Down-right-back 8. Down-left-back

All physical objects must have all these properties in order to appear as 3D objects.

If some of these are missing, the objects will appear as 2D or even 1D.

For 2D objects, the missing properties could be the ones that is associated with top/down or right/left or front/back.

1. top-right 2. top-left 3. down-right 4. down-left

For 1D objects, only one of either of these is used.

1. front-back 2. back-front.

For 1D time motion, these are the properties of forward-backward and backward-forward. These imply that time has two directions

For 1D space motion, these are the properties of right-left and left-right.

For the combined properties of space and time become the following

1. RL-BF 2. RL-FB 3. LR-BF 4. LR-FB

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# A Principle of Directional Invariance

**Physics Forums | Science Articles, Homework Help, Discussion**