*Inverse of a tridiagonal, irreducible, weakly diagonally dominant matrix*- Consider such a homogeneous linear recurrence
**How find this inequality max(min(|a-b|,|b-c|,|c-d|,|d-e|,|e-a|))**- [ Find minimum / maximum of sum / difference of f(x) and g(x) ]
- How find minimum of [ sum of four expressions with radicals ]
- Solving the differential equation f'(x)=af(x+b)
- New beautiful infinite radical
- Show that [ double integral ] = π^2/6
- Ellipse and circle
- When is the moment of inertia of a smooth plane curve is maximum?
- infinitesimal calculus
*Create a number by multi by 2 and divide by 3 (integer part)*- Find max: M = [ highly symmetrical expression with fractions ]
- Solve the following PDE
- How find this limit [ with a ceiling in it ]
- Determinant of transpose?
- How find this sum [ harmonic series ]
- Can every number be written as a small sum of sums of squares?
- Prove or disprove the implication:
- ODE system and Lie symmetries