# Additional Hypotheses

Additional Hypotheses can be applied as a supplement to the main hypotheses, introducing additional concepts to mesh creation.

To define an Additional Hypothesis simply select it in Create Mesh menu. These hypotheses are actually changes in the rules of mesh creation and as such don't possess adjustable values.

### Non Conform mesh allowed hypothesis

Non Conform mesh allowed hypothesis allows to generate non-conform meshes (that is, meshes having some edges ending on an edge or face of adjacent elements).

### Quadratic Mesh

Quadratic Mesh hypothesis allows to build a quadratic mesh (whose edges are not straight but broken lines and can be defined by three points: first, middle and last) instead of an ordinary one.

### Propagation of 1D Hypothesis on opposite edges

Propagation of 1D Hypothesis on opposite edges allows to propagate a hypothesis onto an opposite edge. If a local hypothesis and propagation are defined on an edge of a quadrangular face, the opposite edge will have the same hypothesis, unless another hypothesis has been locally defined on the opposite edge.

See Also a sample TUI Script of a Propagation hypothesis operation.