The Bank of Japan has sought to maintain financial system stability and promote economic recovery, by providing ample liquidity under the quantitative easing policy, to overcome deflation. The Bank has also supported efforts by the financial services industry, using various means, to strengthen the soundness and functioning of the financial system. Our strategy is two-pronged, aiming both to ov...

Using the theory of Calabi–Yau differential equations we obtain all the parameters of Ramanujan–Sato-like series for 1/π2 as q-functions valid in the complex plane. Then we use these q-functions together with a conjecture to find new examples of series of non-hypergeometric type. To motivate our theory we begin with the simpler case of Ramanujan–Sato series for 1/π .