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Jan 22 at 8:57 vote accept eldo
Jan 22 at 8:55 comment added eldo Second curve (Period 20 Pi): {Cos[#]*(0.5 - Cos[Pi/3]) + Cos[#]*Cos[Pi/3]*Cos[0.9 #] + Sin[#]*Sin[0.9 #], Sin[#]*(0.5 - Cos[Pi/3]) + Sin[#]*Cos[Pi/3]*Cos[0.9 #] - Cos[#]*Sin[0.9 #], -Sin[Pi/3] + -Sin[Pi/3]*Cos[0.9 #] } &
Jan 22 at 8:52 comment added eldo Thank you, kglr, for these marvelous solutions. Now there are only two space curves left in my portfolio which cause problems. If you know a solution for them, please post it as a second answer. First curve: {Cos[4 #] Cos[#], Cos[4 #] Sin[#], 0.6 Cos[4 #]} & with a period of 2 Pi
Jan 21 at 21:33 history answered kglr CC BY-SA 4.0