The "pyrogram theorem" does not appear to be a widely recognized term or concept in mathematics, science, or any formal disciplinary framework that I have data on up to October 2023. It’s possible that you may have meant "pythagorean theorem," which is a fundamental principle in geometry related to right triangles.
The Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides. The theorem can be mathematically expressed as:
\[ c^2 = a^2 + b^2 \]
where \( c \) is the length of the hypotenuse, and \( a \) and \( b \) are the lengths of the other two sides.
If "pyrogram" is a term from a specific context, such as a new theory or concept in a certain field, please provide more information, and I'll do my best to assist you!