Fgronov: Rar

: Start with a square piece of paper. If you only have A4 or letter-sized paper, you can find tutorials on YouTube to trim or fold it into a square.

: Position the paper like a diamond and fold it in half, corner to corner, then unfold it to leave a crease.

Depending on your project, you might prefer different styles: Fgronov rar

However, if you are asking how to (a common topic for "making a paper covering"), you can follow these simple origami steps to create one without needing glue or tape. How to Fold a Simple Paper Envelope

You can make a standard envelope using a square piece of paper by following these steps from wikiHow : : Start with a square piece of paper

: If you need a more professional look, use glue and scissors to follow step-by-step official envelope tutorials .

: Fold the bottom corner up so that it slightly overlaps the center where the side flaps meet. Top Flap : Fold the top corner down to close the envelope. Popular DIY Methods Depending on your project, you might prefer different

Could you clarify if you meant (the mathematician), a specific RAR archive file , or something else entirely?