4ce0b361

I'd suggest: Trefethen, Lloyd N., Approximation theory and approximation practice (Extended edition), SIAM, Philadelphia, PA (2020), ISBN 978-1-611975-93-2.

I admire your composture in talking about your loneliness and your apparent reluctance in burdening other people with your problems. While agreeing with some of the other posters on the generic upside of being alive and serving others, I would also like to tell you that God himself, in the person of Christ, has chosen to share in our suffering, and lead us to hope, as a community of believers. PM me if you (or anyone else, for that matter) want.