R_2-nullcline

R_1-nullcline

R_1-nullcline

R_2-nullcline

 stable 
direction

unstable
direction

S(x) = (100 * x^(2) / (400 + x^(2)))
R2nullcline = CurveCartesian(t, S((0.5 * t)), t, 0, 200)
R1nullcline = CurveCartesian(S((0.5 * t)), t, t, 0, 200)
A = Intersect(R2nullcline, R1nullcline, 4.034695969755146E-6, 4.034695969755146E-6)
B:(20, 20)
C:(80, 80)
D = (71.44939198139072, 22.80582424417979)
E = (63.3850801902163, 29.706987781949035)
u = Vector(D, E)
F = (52.515790384720354, 54.13665507974193)
G = (63.73570244200648, 63.00957962830242)
v = Vector(F, G)
H = (24.816632493295188, 79.986893557125)
I = (37.08841130595191, 71.44259584369641)
w = Vector(H, I)
J = (104.40788364966873, 101.87422342575327)
K = (93.1879715923826, 93.98717938258841)
a = Vector(J, K)
L:(3, 3)
M:(8, 8)
N:(80, 20)
O = (73.90374774392205, 25.763465760366607)
P = (67.24192495990842, 36.60815131971829)
Q = (63.3850801902163, 46.46695637367436)
R = (64.08632469379668, 60.26928344921286)
T = (70.04690297422995, 70.4567153383008)
c = PolyLine(N, O, P, Q, R, T, C)
b = Vector(M, L)
d = Vector(B, B + (6 * (1, 1)))
e = Vector(B, B - (6 * (1, 1)))
f = Vector(B + (6 * (1, -1)), B)
g = Vector(B - (6 * (1, -1)), B)
U:(20, 5)
V:(16, 10)
W:(12, 10)
Z:(9, 8)
h = PolyLine(U, V, W, Z, A)
A_1 = Point(R1nullcline)
B_1 = (49.36019011860865, 47.1226937533326)
i = Vector(A_1, B_1)
C_1 = Point(R2nullcline)
D_1:(47.06143, 48.52518)
j = Vector(C_1, D_1)
E_1 = (12.194231428848282, 15.566691092215313)
F_1:(12.19423, 11.56669)
k = Vector(E_1, F_1)
G_1 = (12.194231428848282, 8.554246056411472)
H_1:(8.19423, 8.55425)
l = Vector(G_1, H_1)
I_1 = Point(R2nullcline)
J_1 = (93.88921609596304, 87.79487496099487)
m = Vector(I_1, J_1)
K_1 = Point(R1nullcline)
L_1 = (87.92863781552977, 92.35296423426738)
n = Vector(K_1, L_1)