Viviani4D: A Python framework for exact NURBS representation and interactive visualization of 4D algebraic hypersurfaces. - Antony Y. Vilcamiche-Tripul; Ronald Paul Santamaria Silupu; Yheff Alexander Castillo Maza; Rubén Teodoro Urbina Guzmán; Robert Ipanaqué Chero (SoftwareX, 2026)