per·pet·u·ate
pərˈpeCHəˌwāt
preserve (something valued) from oblivion or extinction
re·cur·sion
rəˈkərZHən
the determination of a succession of elements (such as numbers or functions) by operation on one or more preceding elements according to a rule or formula involving a finite number of steps
re·cur·sive
rəˈkərsiv
relating to, or constituting a procedure that can repeat itself indefinitely
dis·tor·tion
dəˈstôrSH(ə)n
Optics. an aberration of a lens or system of lenses in which the magnification of the object varies with the lateral distance from the axis of the lens
pərˈpeCHəˌwāt
preserve (something valued) from oblivion or extinction
re·cur·sion
rəˈkərZHən
the determination of a succession of elements (such as numbers or functions) by operation on one or more preceding elements according to a rule or formula involving a finite number of steps
re·cur·sive
rəˈkərsiv
relating to, or constituting a procedure that can repeat itself indefinitely
dis·tor·tion
dəˈstôrSH(ə)n
Optics. an aberration of a lens or system of lenses in which the magnification of the object varies with the lateral distance from the axis of the lens