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Replace a variable in differential equation with 0

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Fahad Ramzan
Fahad Ramzan 2021-6-13
评论： Walter Roberson 2021-6-13
I want to reduce this equation by having beta = 0. so that the terms having beta get removed.
((Lemda-((SigmaT(t)).*T))-BetaV(t).*T(t))

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Walter Roberson
Walter Roberson 2021-6-13
Ran in:
syms T(t) SigmaT(t) BetaV(t) Lemda To
ode = diff(T,t) == ((Lemda-((SigmaT(t)).*T))-BetaV(t).*T(t))
ode(t) = 
cond = T(0) == To;
zerofun(t) = sym(0)
zerofun(t) = 
0
modified_ode = subs(ode, BetaV, zerofun)
modified_ode(t) = 
Solution = dsolve(modified_ode, cond)
Solution = 
  2 个评论
Fahad Ramzan
Fahad Ramzan 2021-6-13
Are these answers the same? Because the solution goes this way where i made assumptions as following
%Assumptions
% Lemda = constant input source of uninfected cells per day
% Sigma = normal loss rate constant of uninfected cells
% Beta = infection rate constant of uninfected cells per infected cell
% Mu = loss rate constant of infected cells
% Gamma = loss rate constant of free virus
% N = number of virions produced per day per infected cell
Walter Roberson
Walter Roberson 2021-6-13
Sorry, I am having difficulty reading the image in places, and some of the pieces I think maybe I can read, do not make sense mathematically.

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