Changes in / [1cdfd47:05df1de] in sasmodels

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• doc/guide/pd/polydispersity.rst (modified) (3 diffs)

doc/guide/pd/polydispersity.rst

@@ -20 +20 @@
   P(q) = \text{scale} \langle F^* F \rangle / V + \text{background}
 
-where $F$ is the scattering amplitude and $\langle\cdot\rangle$ denotes an 
-average over the size distribution $f(x; \bar x, \sigma)$, giving
-
-.. math::
-
-  P(q) = \frac{\text{scale}}{V} \int_\mathbb{R} 
-  f(x; \bar x, \sigma) F^2(q, x)\, dx + \text{background}
+where $F$ is the scattering amplitude and $\langle\cdot\rangle$ denotes an
+average over the size distribution.
 
 Each distribution is characterized by a center value $\bar x$ or
@@ -46 +41 @@
 with larger values of $N_\sigma$ required for heavier tailed distributions.
 The scattering in general falls rapidly with $qr$ so the usual assumption
-that $f(r - 3\sigma_r)$ is tiny and therefore $f(r - 3\sigma_r)f(r - 3\sigma_r)$
+that $G(r - 3\sigma_r)$ is tiny and therefore $f(r - 3\sigma_r)G(r - 3\sigma_r)$
 will not contribute much to the average may not hold when particles are large.
 This, too, will require increasing $N_\sigma$.
@@ -68 +63 @@
 
 Additional distributions are under consideration.
-
-.. note:: In 2009 IUPAC decided to introduce the new term 'dispersity' to replace 
-           the term 'polydispersity' (see `Pure Appl. Chem., (2009), 81(2), 
-           351-353 <http://media.iupac.org/publications/pac/2009/pdf/8102x0351.pdf>`_ 
-           in order to make the terminology describing distributions of properties 
-           unambiguous. Throughout the SasView documentation we continue to use the 
-           term polydispersity because one of the consequences of the IUPAC change is 
-           that orientational polydispersity would not meet their new criteria (which 
-           requires dispersity to be dimensionless).
 
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