**Daily update | 15 May, 2022**

# StackExchange

#### Why can't $QBF$ be reduced to $SAT$

**Source:** cs**Views:** 30**Score:** 3**Tags:** reductions satisfiability

#### Why can't we use AIC and p-value variable selection within the same model building exercise?

**Source:** stats**Views:** 68**Score:** 2**Tags:** p-value model-selection aic

#### How to use sparse PCA loadings in a regression?

**Source:** stats**Views:** 16**Score:** 2**Tags:** regression pca sparse

#### Matrix Factorization and Overfitting

**Source:** stats**Views:** 13**Score:** 2**Tags:** machine-learning overfitting recommender-system

#### Find an upper bound for T(n) = T(n/2) + T(n/2 + 1) using the Substitution Method base case fails

**Source:** cs**Views:** 78**Score:** 2**Tags:** complexity-theory asymptotics runtime-analysis recurrence-relation