661 reputation
212
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location UK
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visits member for 1 year, 11 months
seen Aug 26 at 19:56

Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
May
22
awarded  Organizer
May
22
revised 8 less than triple a number is equal to -5 (I'm trying to find the unknown number)
edited tags
May
22
suggested suggested edit on 8 less than triple a number is equal to -5 (I'm trying to find the unknown number)
May
3
accepted The interior of $[0,1]\times \{0\}$ as a subset of $\mathbb{R}^2$ and as a subset of $\mathbb{R}\times\{0\}$.
May
3
comment The interior of $[0,1]\times \{0\}$ as a subset of $\mathbb{R}^2$ and as a subset of $\mathbb{R}\times\{0\}$.
ok, so just use homeomorphism $\mathbb{R}\cong \mathbb{R}\times \{0\}$?
May
3
asked The interior of $[0,1]\times \{0\}$ as a subset of $\mathbb{R}^2$ and as a subset of $\mathbb{R}\times\{0\}$.
Apr
15
asked A group generated by two elements such that its product with itself is not generated by two elements.
Mar
26
accepted Degree of the map and path components
Mar
26
comment Degree of the map and path components
This circle goes around 0 once if $|a|<1$, if $|a|>1$ it doesn't go around 0 at all?
Mar
26
asked Degree of the map and path components
Mar
17
comment Direct image is a Fourier-Mukai transform
essentially, do I have $\mathcal{O}_{\Gamma_f}\simeq i_* \mathcal{O}_X$?
Mar
17
asked Direct image is a Fourier-Mukai transform
Mar
9
asked Example leading to spectral sequence
Mar
3
accepted Domain with a minimal left ideal is a division ring.
Mar
3
asked Domain with a minimal left ideal is a division ring.
Feb
26
asked If two points of intersection of a cubic and a line have real coordinates then so does the third.
Feb
26
asked Pascal's theorem by Bezout's theorem
Feb
23
comment Homeomorphism between the pullback space of a map and the disjoint union of two unit intervals.
Since we know that open subsets of $I$ are finite unions of open intervals, we can write $U_0=\bigcup_{i=0}^n (x_i, x_{i+1})$, then we can consider $\{e^{2\pi i t}: t\in (x_i, x_{i+1})\}$ and show that this is an open subset of $S^1$?