DOC: Added math notation in examples in ltisys.py (#13513)
DOC: Added math notation in examples in ltisys.py (#13513)


perimosocordiae/scipy,perimosocordiae/scipy,Eric89GXL/scipy,scipy/scipy,scipy/scipy,WarrenWeckesser/scipy,anntzer/scipy,Eric89GXL/scipy,rgommers/scipy,zerothi/scipy,perimosocordiae/scipy,WarrenWeckesser/scipy,matthew-brett/scipy,endolith/scipy,Eric89GXL/scipy,tylerjereddy/scipy,mdhaber/scipy,perimosocordiae/scipy,mdhaber/scipy,andyfaff/scipy,grlee77/scipy,vigna/scipy,anntzer/scipy,scipy/scipy,endolith/scipy,ilayn/scipy,scipy/scipy,WarrenWeckesser/scipy,scipy/scipy,tylerjereddy/scipy,WarrenWeckesser/scipy,Eric89GXL/scipy,vigna/scipy,ilayn/scipy,rgommers/scipy,vigna/scipy,andyfaff/scipy,perimosocordiae/scipy,e-q/scipy,Stefan-Endres/scipy,e-q/scipy,Stefan-Endres/scipy,grlee77/scipy,mdhaber/scipy,anntzer/scipy,anntzer/scipy,WarrenWeckesser/scipy,grlee77/scipy,matthew-brett/scipy,Stefan-Endres/scipy,ilayn/scipy,mdhaber/scipy,Eric89GXL/scipy,zerothi/scipy,matthew-brett/scipy,zerothi/scipy,zerothi/scipy,ilayn/scipy,endolith/scipy,grlee77/scipy,endolith/scipy,e-q/scipy,ilayn/scipy,andyfaff/scipy,mdhaber/scipy,tylerjereddy/scipy,andyfaff/scipy,zerothi/scipy,matthew-brett/scipy,scipy/scipy,e-q/scipy,Eric89GXL/scipy,rgommers/scipy,Stefan-Endres/scipy,anntzer/scipy,e-q/scipy,grlee77/scipy,WarrenWeckesser/scipy,tylerjereddy/scipy,rgommers/scipy,endolith/scipy,endolith/scipy,vigna/scipy,andyfaff/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,matthew-brett/scipy,anntzer/scipy,tylerjereddy/scipy,andyfaff/scipy,ilayn/scipy,rgommers/scipy,zerothi/scipy,vigna/scipy,mdhaber/scipy,Stefan-Endres/scipy