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Problem # 3: A vector y R() F(t)]T describes the populations of some rabbits R(t) and...
Problem #1: On a certain island, there is a population of snakes, foxes, hawks and mice. Their populations at time t ar...
Problem #1: On a certain island, there is a population of snakes, foxes, hawks and mice. Their populations at time t are given by s(t), f(), (1), and m(t) respectively. The populations grow at rates given by the differential equations m f'= h' = m' = Putting the four populations into a vector y(t) = [s(t) f(t) h(t) m(t)], this system can be written as y' = Ay Find the eigenvectors and eigenvalues of A. Label the eigenvectors xi through...
Exercise 3, Section 9.5. Modified Lotka- Volterra Predator-Prey model Consider two species (rabbits and foxes) such that the population R (rabbits) and F (foxrs) obey the system of equations dR d...
Exercise 3, Section 9.5. Modified Lotka- Volterra Predator-Prey model Consider two species (rabbits and foxes) such that the population R (rabbits) and F (foxrs) obey the system of equations dR dt dF dt R2-R)-12RF . What happens to the population of rabbits if the number of foxes is arro? (Use the phase line analysis from Chapter 2) What happens to the population of foxes if the number of rabbits is zero? 3. Using the method of nullclines, draw an approximate...
Problem 1 In simple predator-prey models, sinusoidal functions can be used to model the oscillating populations...
Problem 1 In simple predator-prey models, sinusoidal functions can be used to model the oscillating populations of two species of animals in the same environment. As the population of the predator species increases, the population of the prey species will decrease. If the number of prey gets too low, the population of the predator species will suffer from limited resources and start to decline. In this problem we will be modeling one population of rabbits (the prey) and one population...
need answer for qustion2&3. 5:17 childsmath.ca on the answer sheet below. Problem #1: On a certain island, the...
need answer for qustion2&3.
5:17 childsmath.ca on the answer sheet below. Problem #1: On a certain island, there is a population of snakes foxes, hawks and mice. Their populations at time t are given by st), f(), h), and m(t) respectively The populations grow at rates given by the differential equations 0h + h'= m - 4+- m' u유-49 +/준-s유 Putting the y) [s)f() h() m(t)]7, this system can be written as y' Ay four populations into vector Find the...
Problem 5. (20 pts) Let f(y) be the real function f: R R depicted in Figurei,...
Problem 5. (20 pts) Let f(y) be the real function f: R R depicted in Figurei, and consider the autonomous differential equation y(t) = f(y(t)). fly) у FIGURE 1. The function f(y) for Problem 4. (a) How many constant solutions does the above differential equation have ? (b) Study whether the behaviour of each of the constant solutions of the differential equation y(t) = f(y(t)) is stable, unstable or semistable. (c) Discuss the long-term behaviour of all solutions y(t) to...
Problem 2. Assume a random vector (X Y with cdf F(r, ) and pdf f(r,y) (i)...
Problem 2. Assume a random vector (X Y with cdf F(r, ) and pdf f(r,y) (i) Show that Y/X has the pdf f(x, z) |da, g(z) = (ii) For X and identify the distribution of this pdf. xt independent, evaluate the pdf of Y/VX N(0, 1) and Y
1. The populations of two competing species x(t) and y(t) are governed by the non-linear system...
1. The populations of two competing species x(t) and y(t) are governed by the non-linear system of differential equations dx dt 10x – x2 – 2xy, dy dt 5Y – 3y2 + xy. (a) Determine all of the critical points for the population model. (b) Determine the linearised system for each critical point in part (a) and discuss whether it can be used to approximate the behaviour of the non-linear system. (c) For the critical point at the origin: (i)...
(3) - F(2,4) to Consider a system of differential equations describing the progress of a disease...
(3) - F(2,4) to Consider a system of differential equations describing the progress of a disease in a population, given by for a vector-valued function F. In our particular case, this is: t' = 3 – 3zy - 12 y' – 3ay – 2y where I (t) is the number of susceptible individuals at time t and y(t) is the number of infected individuals at time t. The number of individuals is counted in units of 1,000 individuals. and =...
Problem 1 1. Consider the third order equation 2 t²y' - 2y" -3t" Q. Write the...
Problem 1
1. Consider the third order equation 2 t²y' - 2y" -3t" Q. Write the equation above as an equivalent First order differential equations. Use x =Y , X2=4' and x3=y". system of b. express your system of equations in matrix vector form: = Alt) R + g(+)
Partial Differential Equations. Show using the energy arguments that the solutions to this boundary value problem are unique. i.e. u1=u2. u(r, 0) a(0,t) = f(t), a(L, t) = h(t) u(r, 0) a(0,t) = f...
Partial Differential Equations. Show using the energy arguments that the solutions to this boundary value problem are unique. i.e. u1=u2. u(r, 0) a(0,t) = f(t), a(L, t) = h(t) u(r, 0) a(0,t) = f(t), a(L, t) = h(t)
Problem #1: On a certain island, there is a population of snakes, foxes, hawks and mice. Their populations at time t are given by s(t), f(), (1), and m(t) respectively. The populations grow at rates given by the differential equations m f'= h' = m' = Putting the four populations into a vector y(t) = [s(t) f(t) h(t) m(t)], this system can be written as y' = Ay Find the eigenvectors and eigenvalues of A. Label the eigenvectors xi through...
Exercise 3, Section 9.5. Modified Lotka- Volterra Predator-Prey model Consider two species (rabbits and foxes) such that the population R (rabbits) and F (foxrs) obey the system of equations dR dt dF dt R2-R)-12RF . What happens to the population of rabbits if the number of foxes is arro? (Use the phase line analysis from Chapter 2) What happens to the population of foxes if the number of rabbits is zero? 3. Using the method of nullclines, draw an approximate...
need answer for qustion2&3.
5:17 childsmath.ca on the answer sheet below. Problem #1: On a certain island, there is a population of snakes foxes, hawks and mice. Their populations at time t are given by st), f(), h), and m(t) respectively The populations grow at rates given by the differential equations 0h + h'= m - 4+- m' u유-49 +/준-s유 Putting the y) [s)f() h() m(t)]7, this system can be written as y' Ay four populations into vector Find the...
Problem 5. (20 pts) Let f(y) be the real function f: R R depicted in Figurei, and consider the autonomous differential equation y(t) = f(y(t)). fly) у FIGURE 1. The function f(y) for Problem 4. (a) How many constant solutions does the above differential equation have ? (b) Study whether the behaviour of each of the constant solutions of the differential equation y(t) = f(y(t)) is stable, unstable or semistable. (c) Discuss the long-term behaviour of all solutions y(t) to...
Problem 2. Assume a random vector (X Y with cdf F(r, ) and pdf f(r,y) (i) Show that Y/X has the pdf f(x, z) |da, g(z) = (ii) For X and identify the distribution of this pdf. xt independent, evaluate the pdf of Y/VX N(0, 1) and Y
1. The populations of two competing species x(t) and y(t) are governed by the non-linear system of differential equations dx dt 10x – x2 – 2xy, dy dt 5Y – 3y2 + xy. (a) Determine all of the critical points for the population model. (b) Determine the linearised system for each critical point in part (a) and discuss whether it can be used to approximate the behaviour of the non-linear system. (c) For the critical point at the origin: (i)...
(3) - F(2,4) to Consider a system of differential equations describing the progress of a disease in a population, given by for a vector-valued function F. In our particular case, this is: t' = 3 – 3zy - 12 y' – 3ay – 2y where I (t) is the number of susceptible individuals at time t and y(t) is the number of infected individuals at time t. The number of individuals is counted in units of 1,000 individuals. and =...
Problem 1
1. Consider the third order equation 2 t²y' - 2y" -3t" Q. Write the equation above as an equivalent First order differential equations. Use x =Y , X2=4' and x3=y". system of b. express your system of equations in matrix vector form: = Alt) R + g(+)
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