AI-powered math tutoring app Photomath raises $23 million

AI Math Tutoring

AI-powered math tutoring app Photomath today announced that it raised $23 million in series B funding. The company says the proceeds will be used to grow headcount, invest in AI, and scale both product and marketing development. An estimated 65% of households in the U.S. with children report using online learning during the pandemic, with 11% reporting having no live contact with a teacher in the past week (as of November 2020).

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Why does the optimal policy exist?

In a finite Markov Decision Process (MDP), the optimal policy is defined as a policy that maximizes the value of all states at the same time¹. In other words, if an optimal policy exists, then the policy that maximizes the value of state s is the same as the policy that maximizes the value of state s’.² But why should such a policy exist?

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