Adding holo from l-vectors (#20)

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Co-authored-by: Julian Piribauer <julian.piribauer@gmail.com>
Reviewed-on: #20

README.md

@@ -82,12 +82,13 @@ The result is saved in the folder `data/topdata` as a JSON file — giving a
 track of these outputs.
 Note that for Calabi–Yau dimensions larger than four, the additional
 
-## period_computation
+## Operators and periods
 
-`period_computation.sage` provides classes for working with Picard–Fuchs operators and their
+`operators.sage` and `period.sage` provide classes for working with Picard–Fuchs operators and their
 period solutions: `PFOperator`, `PFIdeal` and `Period`, together with Ansatz variants of the first and
 last (`PFOperatorAnsatz`, `PeriodAnsatz`) used to search for unknown operators or periods of a given
-z- and theta-degree.
+z- and theta-degree. The operator classes live in `operators.sage`, the period classes in `period.sage`;
+since the two depend on each other, load `period.sage`, which also loads `operators.sage`.
 
 A `PFOperator` is parsed from a string in the variables `z0, ..., z<n-1>` and `theta0, ..., theta<n-1>`,
 the logarithmic derivatives theta_i = z_i d/dz_i. For example, the quintic's Picard&ndash;Fuchs operator: