Which mathematical software company's logo features a stylized Greek letter that doubles as a graphical representation of its core functionality?

In the world of mathematics education and resources, effective branding and marketing are crucial for reaching students and educators. One mathematical product became particularly famous for its innovative logo design that cleverly incorporated mathematical symbols. This poll tests your knowledge of the intersection between mathematical product branding and visual design.

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Mathematica (stylized lowercase Greek letter pi that transforms into a 3D visualization)
GeoGebra (stylized Greek letter gamma that forms a compass and straightedge)
MATLAB (stylized Greek letter mu that resembles a matrix structure)
Maple (stylized Greek letter sigma that unfolds into a maple leaf shape)