1 | initial version |

Well, thanks God the problem is solved, the error:

```
'sage.rings.integer.Integer' object is not callable
```

was something due to the initial estimation being in the form of a constant number, instead of a function, so that calling it by (x= , ) was nonsense to sage as is a function like 24(x= , ) ! The question about t being positive or negative is also resolved automatically after the initial estimation was set as a function, like e.g. a*x+b putting 'a' equal to zero at the end of the computations, although not a very good way to get rid of that error but anyway that was the only way I found for the code just to work! Thanks

2 | No.2 Revision |

Well, thanks God the problem is solved, the error:

```
'sage.rings.integer.Integer' object is not callable
```

was something due to the initial estimation being in the form of a constant number, instead of a function, so that calling it by (x=
,
) was nonsense to sage as is a function like 24(x=
,
) ! The question about t being positive or negative is also resolved automatically after the initial estimation was set as a function, like e.g. ~~a*x+b putting 'a' equal to zero at the end ~~0*x+b instead of ~~the computations, although not a very good way to get rid of that error but anyway that was the only way I found for the code just to work!
~~constant 'b' alone!

Thanks

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