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[docs] Fix minor typos
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ischoegl authored and bryanwweber committed Dec 8, 2024
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10 changes: 5 additions & 5 deletions doc/sphinx/reference/onedim/nonlinear-solver.md
Original file line number Diff line number Diff line change
Expand Up @@ -65,7 +65,7 @@ $$
J(x) =\pxpy{F(x)}{x}
$$

For the vector-value residual $F(x)$, the Jacobian matrix has elmenets that are
For the vector-value residual $F(x)$, the Jacobian matrix has elements that are
partial derivatives of the residuals with respect to each solution component at each
grid point.

Expand Down Expand Up @@ -160,7 +160,7 @@ $$
During the search for the correct value of $\lambda$, the value of $\lambda$ starts
at 1, it is adjusted down to a value that keeps the solution within the trust region.
The process then begins for finding $\lambda$, failures result in the damping factor
being reduced by a constant factor. The current factor in Cantera is the $\sqrt{2}$.
being reduced by a constant factor. The current factor in Cantera is the $\sqrt{2}$.

During the damped Newton method, the Jacobian is kept at the $x^{(k)}$ value. This
sometimes can cause issues with convergence if the Jacobian becomes out of date
Expand Down Expand Up @@ -284,7 +284,7 @@ F(x_n, x_{n+1}) = -\frac{\alpha}{\Delta t}(x_{n+1} - x_n) + F_{ss}(x_{n+1})
$$

For the Newton method, we linearize the residual equation about the solution vector at
the next iteration(not timestep) by using a Taylor series expansion. The linearized
the next iteration (not time step) by using a Taylor series expansion. The linearized
equation is given by:

$$
Expand Down Expand Up @@ -339,8 +339,8 @@ J_{ss}(x^{(k)}) \Delta x^{(k)} = -\lambda^{(k)} F_{ss}(x^{(k)})
$$

The transient equation has the same form as the steady-state equation, and so the same
damped Newton method can be used to solve the transient problem for a single timestep.
damped Newton method can be used to solve the transient problem for a single time step.

$$
J(x_{n+1}^{(k)}) \Delta x_{n+1}^{(k)} = -\lambda^{(k)} F(x_n, x_{n+1}^{(k)})
$$
$$

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