证明:可逆变换是双射. 设[tex=0.857x1.0]xs/zPwdLSSAmQIIfXPkuWQ==[/tex]为可逆变换，即有可逆变换[tex=1.786x1.214]umkzA/lGqaggQDM+nhhh09myJYRUu5/6pEAdVHfe+CM=[/tex]使[tex=2.571x1.214]LWkxwTYD48E4tDCt0RyhtYBcWtJpQyTduF1EE2VRCUU=[/tex][tex=0.786x0.643]NhuTNiqjImitwKaHFutGOg==[/tex][tex=3.929x1.214]umkzA/lGqaggQDM+nhhh07H/+5I1WpXNDVJblzSP5Wt8zOi8EQ1Ya3jxpWR9hlqE[/tex]
证明:可逆变换是双射. 设[tex=0.857x1.0]xs/zPwdLSSAmQIIfXPkuWQ==[/tex]为可逆变换，即有可逆变换[tex=1.786x1.214]umkzA/lGqaggQDM+nhhh09myJYRUu5/6pEAdVHfe+CM=[/tex]使[tex=2.571x1.214]LWkxwTYD48E4tDCt0RyhtYBcWtJpQyTduF1EE2VRCUU=[/tex][tex=0.786x0.643]NhuTNiqjImitwKaHFutGOg==[/tex][tex=3.929x1.214]umkzA/lGqaggQDM+nhhh07H/+5I1WpXNDVJblzSP5Wt8zOi8EQ1Ya3jxpWR9hlqE[/tex]
1