#### jenniferruurs

Bellow I have some math formulas of the gradient boosting algorithm, I want to know what is mean with this?

Step 1
$\hat{f}(x) \leftarrow \hat{f}(x)+\lambda \hat{f}^b(x).$

Step 2
$r_i \leftarrow r_i - \lambda \hat{f}^b(x_i).$

Final step
$\hat{f}(x) = \sum_{b=1}^B \lambda \hat{f}^b(x).$

How does this formula explain the gradient boosting algorithm or could somebody shortly explain how the gradient boosting algorithm works in terms of math.

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