Canonical model in $\mathbb{P}^{ 4 }$ defined by 3 equations
$ 0 $ | $=$ | $ y^{2} + z^{2} + z w - z t $ |
| $=$ | $y^{2} + z^{2} - z w + z t - w^{2} - t^{2}$ |
| $=$ | $3 x^{2} + y^{2} - z^{2} - w t$ |
Singular plane model Singular plane model
$ 0 $ | $=$ | $ - 18 x^{4} z^{4} - 36 x^{3} y^{2} z^{3} - 36 x^{3} z^{5} - 42 x^{2} y^{4} z^{2} - 48 x^{2} y^{2} z^{4} + \cdots + 9 z^{8} $ |
This modular curve has 4 rational cusps but no known non-cuspidal rational points. The following are the coordinates of the rational cusps on this modular curve.
Canonical model |
$(0:1/2:-1/2:1:0)$, $(0:1/2:1/2:0:1)$, $(0:-1/2:-1/2:1:0)$, $(0:-1/2:1/2:0:1)$ |
Maps to other modular curves
$j$-invariant map
of degree 192 from the canonical model of this modular curve to the modular curve
$X(1)$
:
$\displaystyle j$ |
$=$ |
$\displaystyle 2^3\,\frac{2097152z^{24}-12582912z^{22}t^{2}+12582912z^{21}t^{3}+12582912z^{20}t^{4}-31457280z^{19}t^{5}+52428800z^{18}t^{6}-94371840z^{17}t^{7}+75497472z^{16}t^{8}+62390272z^{15}t^{9}-262668288z^{14}t^{10}+501743616z^{13}t^{11}-757596160z^{12}t^{12}+870580224z^{11}t^{13}-645660672z^{10}t^{14}-93585408z^{9}t^{15}+1672740864z^{8}t^{16}-4737761280z^{7}t^{17}+10583375872z^{6}t^{18}-22048505856z^{5}t^{19}+45481820160z^{4}t^{20}-95108284416z^{3}t^{21}+203012358144z^{2}t^{22}-441993117696zt^{23}-3w^{23}t-39w^{22}t^{2}-241w^{21}t^{3}-1929w^{20}t^{4}-12429w^{19}t^{5}-40577w^{18}t^{6}-131463w^{17}t^{7}-647415w^{16}t^{8}-1434734w^{15}t^{9}+2509002w^{14}t^{10}+25942470w^{13}t^{11}+97882998w^{12}t^{12}+277703094w^{11}t^{13}+699377454w^{10}t^{14}+1687284290w^{9}t^{15}+4055422914w^{8}t^{16}+9753411105w^{7}t^{17}+22971182093w^{6}t^{18}+51370131195w^{5}t^{19}+105459721635w^{4}t^{20}+189503685927w^{3}t^{21}+265781299875w^{2}t^{22}+146450126709wt^{23}+179844046757t^{24}}{t^{3}(262144z^{18}t^{3}-786432z^{17}t^{4}+589824z^{16}t^{5}+917504z^{15}t^{6}-3145728z^{14}t^{7}+5898240z^{13}t^{8}-10092544z^{12}t^{9}+17399808z^{11}t^{10}-30867456z^{10}t^{11}+56688640z^{9}t^{12}-107544576z^{8}t^{13}+209731584z^{7}t^{14}-418512896z^{6}t^{15}+851238912z^{5}t^{16}-1759322112z^{4}t^{17}+3685636096z^{3}t^{18}-7810633728z^{2}t^{19}+16717271040zt^{20}+w^{21}+3w^{20}t-3w^{19}t^{2}-81w^{18}t^{3}-408w^{17}t^{4}-1224w^{16}t^{5}-2464w^{15}t^{6}-5472w^{14}t^{7}-35358w^{13}t^{8}-268442w^{12}t^{9}-1557102w^{11}t^{10}-7183578w^{10}t^{11}-27833472w^{9}t^{12}-93747456w^{8}t^{13}-280082616w^{7}t^{14}-749881448w^{6}t^{15}-1801657803w^{5}t^{16}-3844711329w^{4}t^{17}-7046132023w^{3}t^{18}-9959749389w^{2}t^{19}-5498247168wt^{20}-6778091520t^{21})}$ |
Map
of degree 1 from the canonical model of this modular curve to the plane model of the modular curve
24.192.5.fa.2
:
$\displaystyle X$ |
$=$ |
$\displaystyle x+w$ |
$\displaystyle Y$ |
$=$ |
$\displaystyle y$ |
$\displaystyle Z$ |
$=$ |
$\displaystyle z$ |
Equation of the image curve:
$0$ |
$=$ |
$ -18X^{4}Z^{4}-36X^{3}Y^{2}Z^{3}-36X^{3}Z^{5}-42X^{2}Y^{4}Z^{2}-48X^{2}Y^{2}Z^{4}+18X^{2}Z^{6}-24XY^{6}Z-36XY^{4}Z^{3}+24XY^{2}Z^{5}+36XZ^{7}-5Y^{8}-8Y^{6}Z^{2}-8Y^{4}Z^{4}+12Y^{2}Z^{6}+9Z^{8} $ |
This modular curve minimally covers the modular curves listed below.
This modular curve is minimally covered by the modular curves in the database listed below.