Pauline Ercute
Reputation
Next privilege 75 Rep.
Set bounties
11
Impact
~5k people reached

### Questions (14)

 7 Intuition for Multiple Summation becoming One Summation - Nothing too formal/rigorous please 6 Let $x = h(y, z), y = g(x, z), x = h(y, z)$ to calculate partial derivatives? 4 Derivation or Intuition of Formula for Levi-Civita Symbol 2 If first 1 by 1 upper left submatrix (principal minor) = 0, conclude straightaway saddle point ? - Question 8 2 Change of summation index and Rewriting multiple summation as one sum - Induction Proof of Multinomial Theorem

### Reputation (74)

 +20 Let $x = h(y, z), y = g(x, z), x = h(y, z)$ to calculate partial derivatives? +5 Critcal values of coefficient matrix with parameter where the phrase portrait changes - Boyce, p410, Question 7.6.19 +5 Determinant with Levi-Civita Symbol? +5 For this 2 by 2 locally linear system, how to determine that this “indeterminate” critical point is a centre? Boyce, p516, Question 9.3.12

 3 Looking for a book on Differential Equations *with solutions* 3 What are some common proof strategies in mathematics? 2 Book for proof writing

### Tags (22)

 8 reference-request × 3 3 big-list 5 proof-writing × 2 3 calculus 3 differential-equations × 7 2 book-recommendation 3 proof-strategy × 3 0 proof-verification × 5 3 soft-question 0 multivariable-calculus × 4

### Accounts (3)

 Mathematics 74 rep 11 Area 51 51 rep 2 French Language 1 rep 2