upd

Author: EmptyDust

source/_posts/Princeton-calculus-Reader-revised-edition-note-3.md

@@ -4,3 +4,13 @@ date: 2026-02-19 20:57:54
 tags:
 cover: https://bu.dusays.com/2026/02/19/6997084999527.png
 ---
+
+![6999844845b23.png](https://bu.dusays.com/2026/02/21/6999844845b23.png)
+
+![699985674401c.png](https://bu.dusays.com/2026/02/21/699985674401c.png)
+
+![6999856f07b4b.png](https://bu.dusays.com/2026/02/21/6999856f07b4b.png)
+
+![6999857a58d8f.png](https://bu.dusays.com/2026/02/21/6999857a58d8f.png)
+
+![699981d9c1dc7.png](https://bu.dusays.com/2026/02/21/699981d9c1dc7.png)

source/_posts/Princeton-calculus-Reader-revised-edition-note-4.md

@@ -0,0 +1,23 @@
+---
+title: Princeton-calculus-Reader-revised-edition-note-4
+date: 2026-02-21 18:26:59
+tags:
+cover: https://bu.dusays.com/2026/02/19/6997084999527.png
+---
+
+要注意绝对值
+![6999a88d2c68a.png](https://bu.dusays.com/2026/02/21/6999a88d2c68a.png)
+
+![6999a9008f257.png](https://bu.dusays.com/2026/02/21/6999a9008f257.png)
+
+fun fact:
+更准确的
+![6999af9d729e3.png](https://bu.dusays.com/2026/02/21/6999af9d729e3.png)
+
+相比于此前更简单数学的理论，积分的理论更加经验化，基本由一些特解形成的公式组成。
+
+![6999b22563e4c.png](https://bu.dusays.com/2026/02/21/6999b22563e4c.png)
+
+已经晚上十点了，明天起床先做这道题再继续。
+
+![6999c15b3b278.png](https://bu.dusays.com/2026/02/21/6999c15b3b278.png)

source/_posts/daydreamer.md

@@ -0,0 +1,10 @@
+---
+title: 白日梦想家
+date: 2026-02-21 17:56:38
+tags:
+---
+
+我总说我18岁以前活在梦里，
+如今才发现我向来一直是活在梦里的。
+
+人生如梦

source/_posts/essay001.md

@@ -2,6 +2,7 @@
 title: 001-关于风铃
 date: 2026-02-17 23:23:09
 tags: essay
+cover: https://bu.dusays.com/2026/02/21/6999ad42427eb.jpeg
 ---
 
 起名是一件有趣的事，名字或许确实可以影响一部分人生。

source/_posts/essay002.md

@@ -2,8 +2,8 @@
 title: 002-自是人生长恨水长东
 date: 2026-02-18 09:28:48
 tags: essay
+cover: https://bu.dusays.com/2026/02/21/6999ad55ef4e8.jpeg
 ---
-
 <center>
 
 相见欢·林花谢了春红

source/_posts/essay003.md

@@ -9,4 +9,4 @@ cover: https://bu.dusays.com/2026/02/19/699706a8e7784.png
 
 想成为卡门线上的花，但背后是无数拜科努尔的沙
 
-</center>`
+</center>