Why lower order term is necessary when higher order term is compulsory
33521
Including the interaction but not the main effects in a model
87637
Does it make sense to add a quadratic term but not the linear term to a model?
102406
Why is it not true that if $\Phi \models \exists x \phi$ then there is a term $t$ with $\Phi \models \phi \frac{t}{x}$?
36052
What is the difference between necessary and sufficient conditions?
69919
When can you switch the order of limits?
118012
Meaning of different Orders of Derivative
48529
Is the following word order acceptable?
82169
Why does a partially ordered set need to be reflexive?
77369
Reason behind standard names of coefficients in long Weierstrass equation
18407
Must "first" be followed by "second"?
32028
When is double-quoting necessary?
90325
Why use the derivative and not the symmetric derivative?
103579
Why are the zeroth order terms in degenerate perturbation theory the eigenstates of the perturbing Hamiltonian?
105398
Physical intuition for higher order derivatives
108990
What is the difference between "necessary" and "sufficient"?
64608
Why does the higher order derivative test work?
153727
Constant term in Lagrangian