View source for Quadratic Integrate-and-Fire

<math display="block">\tau \frac{d}{dt}u=a\_{0} (u-u\_{rest}) (u-u\_{c})+RI</math>

Default parameters: <math display="inline">\tau=10</math> ms, <math display="inline">a\_{0}=0.1 mV^{-1}</math>, <math display="inline">u\_{c} = -55</math> mV, <math display="inline">u\_{rest} = -70</math> mV, <math display="inline">R=10 M\Omega</math>, <math display="inline">I=2.2 nA</math>, firing threshold <math display="inline">u\_{thr}=-40 mV</math>.