have explicitly simplified two integrals with respect to w1 and w2 appearing in Eq. (10.5). The simplified version of the early
exercise premium component enhances computational speed of our numerical scheme for finding both the early exercise
boundary and the corresponding option price as the resulting equation is now independent of the modified Bessel functions
which tends to consume much computational time. Given the approximation in Eq. (11.1), the value-matching condition can
also be expressed as


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