# Arithmetic 1D hypothesis

Arithmetic 1D - hypothesis for the Regular 1D algorithm. It allows to split edges into segments with a length that changes in arithmetic progression (Lk = Lk-1 + d) beginning from a given starting length and up to a given end length.

Similar to Start and End Length.

To define the Arithmetic 1D hypothesis:

Select this hypothesis in the Create Hypotheses dialog box click Create. The following dialog box will appear:

In this dialog box you can set:

- Name of your Arithmetic 1D hypothesis;

- Start and End length values