Which mathematical element was intentionally incorporated into Wolfram Research's logo redesign in 2013?

Corporate logos often contain hidden mathematical elements or evolve through mathematically-informed design principles. In the world of mathematics education and technology, brand identities can reflect mathematical concepts through their visual language. This poll tests your knowledge of how mathematics and corporate identity have intersected in one famous mathematical software company's logo evolution.

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The golden ratio (φ) in the proportions of the stylized 'W'
A Möbius strip integrated into the negative space
The Fibonacci sequence represented by the spacing between elements
A fractal pattern that recursively creates the brand name