Ceva, cevians, and Routh’s theorem
I keep running into Edward John Routh (1831–1907). He is best known for the Routh-Hurwitz stability criterion but he pops up occasionally elsewhere. The previous post discussed Routh’s mnemonic for moments of inertia and his “stretch” theorem. This post will discuss his triangle theorem. Before stating Routh’s theorem, we need
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Read moreMoments of inertia mnemonic
Edward John Routh (1831–1907) came up with a mnemonic for summarizing many formulas for moment of inertia of a solid rotating about an axis through its center of mass. Routh’s mnemonic is I = MS / k where M is the mass of an object, S is the sum of
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Read moreThis is how bad China’s startup scene looks now
In early 2018, VC Mike Moritz wrote in the FT that “Silicon Valley would be wise to follow China’s lead,” noting the pace of work at tech companies was “furious” and that China offered “investment opportunities in the best companies.” Soon after, it all imploded. Worse, as the FT notes
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Read moreFintech Bolt is buying out the investor suing over Ryan Breslow’s $30M loan
Bolt says it has settled its long-standing lawsuit with its investor Activant Capital. One-click payments startup Bolt is settling the suit by buying out the investor’s stake “after which Activant will no longer hold any interest in Bolt,” the company said in a statement. Activant’s suit accused founder and then
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