摘要 : The present Special Focus of Mathematics in Computer Science is connected to SYMCOMP2021, the 5th International Conference on Numerical and Symbolic Computation: Developments and Applications. Due to the Covid-19 pandemic, this co... 展开 The present Special Focus of Mathematics in Computer Science is connected to SYMCOMP2021, the 5th International Conference on Numerical and Symbolic Computation: Developments and Applications. Due to the Covid-19 pandemic, this conference ran in an online format, duringMarch 25-26, 2021, being the virtual host, the University of Evora in Portugal. This ECCOMAS Thematic Conference was a joint organization of IDMEC (Mechanical Engineering Institute) and UEvora (University of Evora), under the auspice of APMTAC (Portuguese Society of Theoretical, Applied, and Computational Mechanics). The conference counted with the sponsorship of Wolfram Research which distinguished two Young Researchers for their relevant works, as in previous editions of this event. The conference proceedings book (ISBN-978-989-99410-6-9) is published online on the ECCOMAS website. Most of the papers in this special focus are extended or new versions of communications presented at the 5th International Conference on Numerical and Symbolic Computation, being their topics example of the multidisciplinary character of this event. Numerical and symbolic computation methods and techniques are undoubtedly fundamental tools in a wide range of science and technology fields, as illustrated by the following six papers selected for this Special Focus. 收起