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It has been proposed that Nodal admittance matrix be merged with Admittance parameters.

• oppose as these appear to refer to different entities:
• The nodal admittance matrix in the context of power engineering is not clearly defined by this page, but[now it is [1] ] seems to coincide with my understanding of this term in network theory - that is, it's the coefficients of the equations to be solved in nodal analysis. So Kirchhoff's current law is 0 = YV where Y is the nodal admittance matrix and V is a vector of voltages, being the voltage of each circuit node with respect to a common ground.
• The matrix of admittance parameters relates port currents and port voltages in a black-box representation of a network (whose internal nodes are not considered). Each port consists of a pair of terminals carrying equal and opposite currents into and out of the box. There is no concept of a common ground.
Of course, both are square matrices of admittances. --catslash (talk) 23:09, 14 December 2011 (UTC)
oppose I agree. The nodal admittance matrix is an N x N matrix used in general circuit analysis of electronic circuits (networks). The admittance parameters are a 2 x 2 matrix used with the two-port network model. They're related, but not enough to merge into the same article --ChetvornoTALK 01:16, 3 April 2012 (UTC)

The (albeit meagre) response to this proposal over the last 18 months has been entirely negative. I shall therefore remove the merge templates. --catslash (talk) 23:59, 28 September 2012 (UTC)

## Editing the "Context" Section

I thought the "Context" Section of the article was very brief and could use some elaboration in order to make the purpose and origins of the admittance matrix more clear to readers without much background in electrical engineering. I expanded on why the admittance matrix is a useful tool and why computers are needed to solve these systems, as well as where the principles used to construct the admittance matrix come from, to hopefully give readers a better understanding of the concept.

S.ham2015 (talk) 16:51, 25 November 2013 (UTC)

## Construction of the Admittance Matrix in the "Design" Section

Using the subscript ${\displaystyle i}$ in the summation ${\displaystyle \sum _{i\neq j}y_{ij}}$ in the case where ${\displaystyle i=j}$ is confusing, as the variable ${\displaystyle i}$ is also used in the index of ${\displaystyle Y_{ij}}$. Replacing ${\displaystyle i}$ in the summation with another variable may be helpful. For instance

${\displaystyle Y_{ij}={\begin{cases}y_{ii}+\sum _{k\neq i}{y_{ik}},&{\mbox{if }}i=j\\-y_{ij},&{\mbox{if }}i\neq j.\end{cases}}}$

— Preceding unsigned comment added by Gkaf (talkcontribs) 21:37, 24 February 2015 (UTC) Gkaf (talk) 21:51, 24 February 2015 (UTC)

Yes, it's clearer if the bound variable of the summation is distinct from the matrix row-number. I have changed it, but please be bold and do it yourself next time (also please sign your posts on talk pages by typing four tildes ~~~~ or by pressing the signature button on the edit box tool bar).
The parameter ${\displaystyle y_{ii}}$ is also confusingly named; would ${\displaystyle y_{i0}}$ or ${\displaystyle y_{i\,\mathrm {ground} }}$ be better? --catslash (talk) 00:06, 26 February 2015 (UTC)

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