/usr/share/doc/model-builder/examples/nagumo.ode is in model-builder 0.4.1-6.2.
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<!--Model Builder 0.2.6 - model definition file-->
<body>
<modelname>
nagumo.ode
</modelname>
<equation number="0">
p[0]-y[1]+p[1]
</equation>
<equation number="1">
p[2]*y[0]-p[3]*y[1]
</equation>
<parameter number="0">
y[0]*(0.25-y[0])*(y[0]-1)
</parameter>
<parameter number="1">
0.5
</parameter>
<parameter number="2">
0.002
</parameter>
<parameter number="3">
0.002
</parameter>
<end>
5000
</end>
<results>
(array([[ 0.1 , 0.1 ],
[ 0.13863773, 0.10000386],
[ 0.17742268, 0.10001546],
...,
[ 0.07837299, 0.48121172],
[ 0.07901386, 0.48113122],
[ 0.07965821, 0.48105087]]), {'nfe': array([ 23, 27, 33, ..., 13850, 13854, 13854]), 'nje': array([ 0, 0, 0, ..., 77, 77, 77]), 'tolsf': array([ 0., 0., 0., ..., 0., 0., 0.]), 'nqu': array([4, 4, 4, ..., 4, 4, 4]), 'lenrw': 52, 'tcur': array([ 1.31308733e-01, 2.06192375e-01, 3.45345574e-01, ...,
4.99982351e+03, 5.00052277e+03, 5.00052277e+03]), 'hu': array([ 0.03744182, 0.03744182, 0.06426956, ..., 0.86701256,
0.6992605 , 0.6992605 ]), 'imxer': 0, 'leniw': 22, 'tsw': array([ 0. , 0. , 0. , ..., 4885.16048273,
4885.16048273, 4885.16048273]), 'message': 'Integration successful.', 'nst': array([ 10, 12, 15, ..., 6606, 6607, 6607]), 'mused': array([1, 1, 1, ..., 1, 1, 1])})
</results>
<start>
0
</start>
<init>
0.1 0.1
</init>
<step>
0.1
</step>
<trange></trange>
</body>
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