Update: add tag

+ . * . - . Issue: -
love1angel · Oct 12, 2024 · 165c596 · 165c596
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diff --git a/org-roam/20241009152151-terminology.org b/org-roam/20241009152151-terminology.org
@@ -6,5 +6,6 @@
 | English | meaning                                                    | Chinese |
 |---------+------------------------------------------------------------+---------|
 | vanilla | having no special or extra features; ordinary or standard. | 香草    |
+| Orion   | Greek. means a rising star                                 | 猎户座  |
 |         |                                                            |         |
 |---------+------------------------------------------------------------+---------|
diff --git a/org-roam/20241009154548-c.org b/org-roam/20241009154548-c.org
@@ -2,5 +2,6 @@
 :ID:       38F97C08-3471-456B-A1EE-F1A6FEBF440F
 :END:
 #+title: C++
+#+filetags: :cpp:
 
 [https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines]
diff --git a/org-roam/20241009183332-algorithm.org b/org-roam/20241009183332-algorithm.org
@@ -1,26 +1,28 @@
 :PROPERTIES:
 :ID:       373231FE-02EF-416D-91DD-99F3D1191FFD
 :END:
-#+title: algorithm
+#+title: Algorithm
 
-* 袖珍计算器算法
+* Numerical analysis
+
+** [[https://en.wikipedia.org/wiki/Newton%27s_method][Newtons's method]]
 
 #+begin_export latex
 \[
-e^{i\pi} = -1
+X_{n+1} = X_n - \frac{f(X_n)}{f'(X_n)}
 \]
 #+end_export
 
-x ^ 1/2 = (e lnx) ^ 1/2 = e lnx/2
-
-* Newtons's method
+** estimate sqrt()
 
-[https://en.wikipedia.org/wiki/Newton%27s_method]
+#+begin_export latex
+\[
+\sqrt{x} = x^{1/2} = \left( e^{\ln{x}} \right)^{1/2} = e^{\frac{1}{2} \ln{x}}
+\]
+#+end_export
 
 * sort
 
 ** select sort
 
 ** fish sort
-
-I've bisected the regression to <commit hash>.
diff --git a/org-roam/20241011155035-settings.org b/org-roam/20241011155035-settings.org
@@ -3,6 +3,8 @@
 :END:
 #+title: settings
 
+* common
+
 * OS X
 
 ** fonts

diff --git a/org-roam/20241012110326-pmr.org b/org-roam/20241012110326-pmr.org
@@ -0,0 +1,5 @@
+:PROPERTIES:
+:ID:       E221B3A4-146A-4177-B40C-6639F9EC15F6
+:END:
+#+title: pmr
+#+filetags: :cpp17:
diff --git a/org-roam/org-roam.db b/org-roam/org-roam.db
-Original file line number
+Diff line change
@@ Expand Up / @@ -3,6 +3,8 @@ @@
     :END:
     #+title: settings
+    * common
     * OS X
     ** fonts
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