Update README.md

README.md

@@ -88,8 +88,8 @@ Each row in the dataset consists of the following columns:
 
 - `X`: the input value of the function f.
 - `f`: the value of the function f at X.
-- `Y`: the input value of the derivative f'.
-- `f'`: the value of the derivative f' at Y.
+- `Y`: the input value of the derivative Tf.
+- `Tf`: the value of the derivative Tf at Y.
 
 ### Data
 
@@ -100,4 +100,4 @@ The dataset contains the following data:
 | X       | (100,)  | float   |
 | f       | (100,)  | float   |
 | Y       | (100,)  | float   |
-| f'      | (100,)  | float   |
+| Tf      | (100,)  | float   |