Algorithms and programs for the solution of linear ill-posed problems from the monograph:
A.N.Tikhonov, A.V.Goncharsky, V.V.Stepanov, A.G.Yagola "Numerical methods for the solution of ill-posed problems" - Kluwer Academic Publishers, Dordrecht, 1995

All these programs are written on  FORTRAN 77.

1. The program for the solution of Fredholm integral equation of the first kind using the transformation of Euler equation ti threediagonal matrix system.
   • Listing of the main routine, the function and the results (fig4_2.txt).
   • Listing of the subroutines (listing_01.txt, listing_01.zip).
   • The main routine, the function (ptimc.for, ptimc.zip) and the subroutines (ptim.for, ptim.zip).
   • The block (the main routine, the function and the subroutines (+general)). (application_01.zip).
2. The program for the solution of Fredholm integral equation of the first kind using conjugate method.
   • Listing of the main routine, the function and the results (fig4_3.txt).
   • Listing of the subroutines (listing_02.txt, listing_02.zip).
   • The main routine, the function (ptizc.for, ptizc.zip) and the subroutines (ptiz.for, ptiz.zip).
   • The block (the main routine, the function and the subroutines (+general)). (application_02.zip).
3. The program for the solution of Fredholm integral equation of the first kind on nonnegative functions set using regularizing method.
   • Listing of the main routine, the function and the results (fig4_4.txt).
   • Listing of the subroutines (listing_03.txt, listing_03.zip).
   • The main routine, the function (ptipc.for, ptipc.zip) and the subroutines (ptip.for, ptip.zip).
   • The block (the main routine, the function and the subroutines (+general)). (application_03.zip).
4. The program for the solution of onedimensional convolution type integral equation.
   • Listing of the main routine, the function and the results (fig4_5.txt).
   • Listing of the subroutines (listing_04.txt, listing_04.zip).
   • The main routine, the function (ptikc.for, ptikc.zip) and the subroutines  (ptik.for, ptik.zip).
   • The block (the main routine, the function and the subroutines (+general)). (application_04.zip).
5. The program for the solution of twodimensional convolution type integral equation.
   • Listing of the main routine, the function and the results (fig4_6.txt).
   • Listing of the subroutines (listing_05.txt, listing_05.zip).
   • The main routine, the function (ptitc.for, ptitc.zip) and the subroutines (ptit.for, ptit.zip).
   • The block (the main routine, the function and the subroutines (+general)). (application_05.zip).
6. The program for the solution of Fredholm integral equation of the first kind on monotonous and (or) convex functions sets. Conditional gradient method.
   • Listing of the main routine, the function and the results (fig4_7.txt).
   • Listing of the subroutines (listing_06.txt, listing_06.zip).
   • The main routine, the function (ptigc.for, ptigc.zip) and the subroutines (ptig.for, ptig.zip).
   • The block (the main routine, the function and the subroutines (+general)). (application_06.zip).
7. The program for the solution of Fredholm integral equation of the first kind on monotonous and (or) convex functions sets. The method of conjugate gradients projections.
   • Listing of the main routine, the function and the results (fig4_8.txt).
   • Listing of the subroutines (listing_07.txt, listing_07.zip).
   • The main routine, the function (ptilc.for, ptilc.zip) and the subroutines (ptil.for, ptil.zip).
   • The block (the main routine, the function and the subroutines (+general)). (application_07.zip).
   Remark: the program does not use ENTRY.
8. The program for the solution of Fredholm integral equation of the first kind on monotonous and (or) convex functions sets. The method of conjugate gradients projections on nonnegative vectors set.
   • Listing of the main routine, the function and the results (fig4_11.txt).
   • Listing of the subroutines (listing_08.txt, listing_08.zip).
   • The main routine, the function (ptisc.for, ptisc.zip) and the subroutines (ptis.for, ptis.zip).
   • The block (the main routine, the function and the subroutines (+general)). (application_08.zip).
9. General programs.
   • Listing of the subroutines (listing_09.txt, listing_09.zip).
   • The subroutines (ptic.for, ptic.zip).

All listings of the subroutines (all_listings.zip, all_listings.txt) and the main routines with the functions and the results (all_figures.zip, all_figures.txt).