Does anyone know what triangular constraint is?

[habbakuk87]

Reading up a paper named flickr distance, there is a mention of triangular constraint but am unable to find a proper definition of it. Any help or pointers in the right direction are appreciated.

 

[PsiStar]

I think this is a comprehensive explanation. :hmm:

Maybe email one of the authors?

 

[willem2]

The triangle inequality.

The distance(A,C) <= distance (A,B) + distance(B,C)

 

[Rudy Toody]

Here is the mathematical explanation.