243 reputation
19
bio website
location Sevastopol, Russia
age 28
visits member for 2 years, 4 months
seen Aug 13 at 19:10

Aug
13
accepted How to find a basis of an image of a linear transformation?
Aug
12
comment How to find a basis of an image of a linear transformation?
@BenWest thanks to you and André Nicolas, now it seems clear to me.
Aug
12
revised How to find a basis of an image of a linear transformation?
edited title
Aug
12
comment How to find a basis of an image of a linear transformation?
could you please provide an example?
Aug
12
asked How to find a basis of an image of a linear transformation?
Aug
1
accepted reduction of $6xy + 8 y^2 -12x-26y + 11 = 0$ to canonical one of a second-order curve
Jul
31
revised reduction of $6xy + 8 y^2 -12x-26y + 11 = 0$ to canonical one of a second-order curve
globally changes $\sin{\alpha}^2$ to $\sin^2{\alpha}$ and the same thing for cos
Jul
30
comment reduction of $6xy + 8 y^2 -12x-26y + 11 = 0$ to canonical one of a second-order curve
thank you, but the main confusing thing was why I was not able to get the correct coordinates of transformed system's origin.
Jul
30
answered reduction of $6xy + 8 y^2 -12x-26y + 11 = 0$ to canonical one of a second-order curve
Jul
29
comment reduction of $6xy + 8 y^2 -12x-26y + 11 = 0$ to canonical one of a second-order curve
sorry, but I missed the point. Could you please detail how can I get the right answer (that the given equation is an equation of a hyperbola, which is rotated and shifted to the point (-1,2))?
Jul
29
revised reduction of $6xy + 8 y^2 -12x-26y + 11 = 0$ to canonical one of a second-order curve
rollback in order to undo last edit
Jul
29
revised reduction of $6xy + 8 y^2 -12x-26y + 11 = 0$ to canonical one of a second-order curve
added 199 characters in body
Jul
29
comment reduction of $6xy + 8 y^2 -12x-26y + 11 = 0$ to canonical one of a second-order curve
thank you, I did not know about this way. I'll try it asap.
Jul
29
revised reduction of $6xy + 8 y^2 -12x-26y + 11 = 0$ to canonical one of a second-order curve
added 10 characters in body
Jul
29
asked reduction of $6xy + 8 y^2 -12x-26y + 11 = 0$ to canonical one of a second-order curve
Jul
27
accepted Could anybody provide a more detailed explanation of a tangent equation in its general form?
Jul
27
comment Could anybody provide a more detailed explanation of a tangent equation in its general form?
thank you, it just did not come to my mind that ' symbol has a meaning of a derivative. And in the textbook this word was not mentioned
Jul
27
asked Could anybody provide a more detailed explanation of a tangent equation in its general form?
Jul
27
accepted how to prove $ax + by = cx + dy \implies a = c, b = d$?
Jul
27
comment how to prove $ax + by = cx + dy \implies a = c, b = d$?
how you can be sure that if $x \neq 0, y \neq 0 \implies a - c = b - d$ ? Could you please detail this?