$\GL_2(\Z/16\Z)$-generators: |
$\begin{bmatrix}5&11\\0&9\end{bmatrix}$, $\begin{bmatrix}7&14\\0&15\end{bmatrix}$, $\begin{bmatrix}15&3\\0&1\end{bmatrix}$, $\begin{bmatrix}15&6\\0&7\end{bmatrix}$ |
$\GL_2(\Z/16\Z)$-subgroup: |
$\OD_{32}:C_2^3$ |
Contains $-I$: |
yes |
Quadratic refinements: |
16.192.1-16.g.1.1, 16.192.1-16.g.1.2, 16.192.1-16.g.1.3, 16.192.1-16.g.1.4, 16.192.1-16.g.1.5, 16.192.1-16.g.1.6, 32.192.1-16.g.1.1, 32.192.1-16.g.1.2, 32.192.1-16.g.1.3, 32.192.1-16.g.1.4, 48.192.1-16.g.1.1, 48.192.1-16.g.1.2, 48.192.1-16.g.1.3, 48.192.1-16.g.1.4, 48.192.1-16.g.1.5, 48.192.1-16.g.1.6, 80.192.1-16.g.1.1, 80.192.1-16.g.1.2, 80.192.1-16.g.1.3, 80.192.1-16.g.1.4, 80.192.1-16.g.1.5, 80.192.1-16.g.1.6, 96.192.1-16.g.1.1, 96.192.1-16.g.1.2, 96.192.1-16.g.1.3, 96.192.1-16.g.1.4, 112.192.1-16.g.1.1, 112.192.1-16.g.1.2, 112.192.1-16.g.1.3, 112.192.1-16.g.1.4, 112.192.1-16.g.1.5, 112.192.1-16.g.1.6, 160.192.1-16.g.1.1, 160.192.1-16.g.1.2, 160.192.1-16.g.1.3, 160.192.1-16.g.1.4, 176.192.1-16.g.1.1, 176.192.1-16.g.1.2, 176.192.1-16.g.1.3, 176.192.1-16.g.1.4, 176.192.1-16.g.1.5, 176.192.1-16.g.1.6, 208.192.1-16.g.1.1, 208.192.1-16.g.1.2, 208.192.1-16.g.1.3, 208.192.1-16.g.1.4, 208.192.1-16.g.1.5, 208.192.1-16.g.1.6, 224.192.1-16.g.1.1, 224.192.1-16.g.1.2, 224.192.1-16.g.1.3, 224.192.1-16.g.1.4, 240.192.1-16.g.1.1, 240.192.1-16.g.1.2, 240.192.1-16.g.1.3, 240.192.1-16.g.1.4, 240.192.1-16.g.1.5, 240.192.1-16.g.1.6, 272.192.1-16.g.1.1, 272.192.1-16.g.1.2, 272.192.1-16.g.1.3, 272.192.1-16.g.1.4, 272.192.1-16.g.1.5, 272.192.1-16.g.1.6, 304.192.1-16.g.1.1, 304.192.1-16.g.1.2, 304.192.1-16.g.1.3, 304.192.1-16.g.1.4, 304.192.1-16.g.1.5, 304.192.1-16.g.1.6 |
Cyclic 16-isogeny field degree: |
$1$ |
Cyclic 16-torsion field degree: |
$8$ |
Full 16-torsion field degree: |
$256$ |
Weierstrass model Weierstrass model
$ y^{2} $ | $=$ | $ x^{3} - 4x $ |
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.
Maps to other modular curves
$j$-invariant map
of degree 96 from the Weierstrass model of this modular curve to the modular curve
$X(1)$
:
$\displaystyle j$ |
$=$ |
$\displaystyle \frac{1}{2}\cdot\frac{1440x^{2}y^{30}-6331507008x^{2}y^{28}z^{2}+20986578616320x^{2}y^{26}z^{4}-6329041585489920x^{2}y^{24}z^{6}+563262454239068160x^{2}y^{22}z^{8}-21730522821489524736x^{2}y^{20}z^{10}+433667781480929034240x^{2}y^{18}z^{12}-4948710315703507353600x^{2}y^{16}z^{14}+34119568108114642206720x^{2}y^{14}z^{16}-144342258184677526339584x^{2}y^{12}z^{18}+363883563600464691855360x^{2}y^{10}z^{20}-537412063354833296424960x^{2}y^{8}z^{22}+625791935148732375367680x^{2}y^{6}z^{24}-207525673731877572182016x^{2}y^{4}z^{26}+26563305132954778337280x^{2}y^{2}z^{28}-1180591550348667125760x^{2}z^{30}-717088xy^{30}z+144995788800xy^{28}z^{3}-170850445963776xy^{26}z^{5}+33012291743907840xy^{24}z^{7}-2252941884355903488xy^{22}z^{9}+72270563099856076800xy^{20}z^{11}-1262417726380543311872xy^{18}z^{13}+13009444261275327528960xy^{16}z^{15}-82471581097447460438016xy^{14}z^{17}+328112718679976580218880xy^{12}z^{19}-827393423544758965370880xy^{10}z^{21}+1230421470255462765035520xy^{8}z^{23}-465618928125134818508800xy^{6}z^{25}+66408280248651129815040xy^{4}z^{27}-3246626974565067128832xy^{2}z^{29}-y^{32}+135590400y^{30}z^{2}-2049829642752y^{28}z^{4}+1085901562920960y^{26}z^{6}-132101324886622208y^{24}z^{8}+6265238441101885440y^{22}z^{10}-145336112178427068416y^{20}z^{12}+1852447788216625397760y^{18}z^{14}-13849060543131040088064y^{16}z^{16}+62895491540280410112000y^{14}z^{18}-174704222098988126437376y^{12}z^{20}+268738072837776495083520y^{10}z^{22}-103471787185155610771456y^{8}z^{24}+14951175651152929751040y^{6}z^{26}-738658147969869545472y^{4}z^{28}+25332747903959040y^{2}z^{30}-281474976710656z^{32}}{y^{2}(x^{2}y^{28}+10432x^{2}y^{26}z^{2}-2946560x^{2}y^{24}z^{4}+176889856x^{2}y^{22}z^{6}+13410590720x^{2}y^{20}z^{8}-1268000489472x^{2}y^{18}z^{10}-6440731017216x^{2}y^{16}z^{12}+1244886640623616x^{2}y^{14}z^{14}+29798883857006592x^{2}y^{12}z^{16}+315183165318627328x^{2}y^{10}z^{18}+1888977344639533056x^{2}y^{8}z^{20}+6881491090931712000x^{2}y^{6}z^{22}+14915905954213003264x^{2}y^{4}z^{24}+13835044861142630400x^{2}y^{2}z^{26}+18446739675663040512x^{2}z^{28}+48xy^{28}z+52800xy^{26}z^{3}-18251776xy^{24}z^{5}+1640411136xy^{22}z^{7}-7301890048xy^{20}z^{9}-4322589999104xy^{18}z^{11}+35669988605952xy^{16}z^{13}+4497855024726016xy^{14}z^{15}+85902292536000512xy^{12}z^{17}+809944614852100096xy^{10}z^{19}+4476580366068482048xy^{8}z^{21}+15132098768054255616xy^{6}z^{23}+31128883922919751680xy^{4}z^{25}+46116861283785506816xy^{2}z^{27}+976y^{28}z^{2}-101376y^{26}z^{4}-33095168y^{24}z^{6}+6436618240y^{22}z^{8}-281169887232y^{20}z^{10}-6842473250816y^{18}z^{12}+310080609189888y^{16}z^{14}+10044258568372224y^{14}z^{16}+120871725133987840y^{12}z^{18}+783619497574531072y^{10}z^{20}+2994897639146782720y^{8}z^{22}+6917564761768984576y^{6}z^{24}+10376357313136033792y^{4}z^{26}+52776558133248y^{2}z^{28}+17592186044416z^{30})}$ |
Hi
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Cover information
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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.