In contrast to the Conference, we plan to organize the Courses as more traditional in-person events, taking into account social distancing and other imposed measures. Hence, we are opening registration for ISAAC31 and ISMA45. Nevertheless, as nobody knows how the future will evolve, we will continuously monitor the COVID-19 situation. If necessary, a cancellation with full refund of the Courses will be communicated no later than September 1st. In such case, the Courses will not be postponed, nor will they be transformed into virtual events.