Mirja Hartimo (University of Helsinki) works on phenomenological perspective to philosophy of mathematics and logic. Her recent publications include Husserl and Mathematics (2021). Frode Kjosavik (Norwegian University of Life Sciences) works on Kant, Husserl, metaphysics, philosophy of mathematics, and philosophy of science. He is the editor of Metametaphysics and the Sciences: Historical and Philosophical Perspectives (with Camilla Serck-Hanssen, 2020). Øystein Linnebo (University of Oslo) works on metaphysics and the philosophy of logic and mathematics. His recent publications include Thin Objects: An Abstractionist Account (2018) and The Many and the One: A Philosophical Study of Plural Logic (with Salvatore Florio, 2021).