I have made some research about overfitting and underfitting, and I have understood what they exactly are, but I cannot find the reasons. What are the main reasons for overfitting and underfitting
machine learning - General question regarding Over-fitting vs Complexity of Models - Cross Validated
Cross-validation-assessing network's generalization ability.
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Solved Overfitting and underfitting are common problems in
Overfitting and underfitting in machine learning
Illustration of the underfitting/overfitting issue on a simple
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Overfitting DataRobot AI Wiki
Overfitting vs Underfitting in Machine Learning [Differences]
regression - Assessing overfitting via learning curves - Cross Validated