Hakainde Hichilema is the president of Zambia, elected in 2021. A former businessman, he is one of the few world leaders with an MBA. Mr Hichilema says there has been a "sea change" in how deals are done in Africa: rather than things being done to Africa, deals are increasingly "partnerships".
Every nonzero finite dimensional inner product space has an orthonormal basis. It makes sense, when you don't think about it.