Combinatorics cryptography information theory group theory
https://scholar.google.co.uk/citations?user=PeQIxyoAAAAJ&hl=en
Peter Neumann
Stanford University
Verified email at stanford.edu
neural plasticityensemblesaddictioncircuits
https://scholar.google.com/citations?user=mHNWKY4AAAAJ&hl=en
Peter M. Neumann
https://scholar.google.com/scholar?q=%5B7%5D+Peter+M.+Neumann+D.+Phil.+Thesis+University+of+Oxford+1966
https://www.javatpoint.com/discrete-mathematics-normal-subgroup
師大 陳華介教授
http://math.ntnu.edu.tw/~li/algebra-html/node13.html
http://math.ntnu.edu.tw/~li/algebra-html/algebra.pdf
http://www2.chsh.chc.edu.tw/bee/108algebra/1080303.pdf
https://hackmd.io/@0xff07/ryQE2n3SI
https://hackmd.io/@0xff07/BJWaeWArL/https%3A%2F%2Fhackmd.io%2F%400xff07%2FByT4ldAS8
Sage
http://doc.sagemath.org/html/en/thematic_tutorials/group_theory.html#normal-subgroups
https://math.berkeley.edu/~apaulin/AbstractAlgebra.pdf
https://www.macs.hw.ac.uk/~jim/F13YR1/Notes.pdf
https://books.google.com.tw/books?id=4PWKDwAAQBAJ&pg=PA67&lpg=PA67&dq=normal+group+tutorial&source=bl&ots=T6sZfVNDyN&sig=ACfU3U3lTyA62FyKuvRxlEOjPSDDG9hRrA&hl=zh-TW&sa=X&ved=2ahUKEwjTgqD3gIfpAhU2yYsBHWKnD2sQ6AEwGHoECAwQAQ#v=onepage&q=normal%20group%20tutorial&f=false
https://www.jmilne.org/math/CourseNotes/GT.pdf
https://nathancarter.github.io/group-explorer/help/rf-groupterms/#simple-group
GAP
https://www.gap-system.org/Manuals/doc/tut/manual.pdf
