PageScribble for Safari vs LinearMaster

PageScribble lets you draw on any webpage in Safari. Review a design, teach a concept, highlight research, or sort out your thoughts, right on the page. DRAW AND MARK UP Pen, marker, eraser, text, lines, arrows, rectangles, ellipses, triangles, and stars. Set the stroke width, pick any color, or sample one from the page with the eyedropper. PRESENT AND TEACH Point with a laser that leaves a fading trail, spotlight one area while the rest of the page dims, write in ink that fades on its own, or switch to a blank board. Show your mouse clicks for recordings and calls. GESTURES THAT KEEP YOU DRAWING Use gestures like scribbling over a drawing to erase it, or pausing at the end of a stroke to turn it into a clean shape. Turn them on whenever you like. ANY INPUT Mouse, trackpad, finger, or Apple Pencil on compatible iPads. Choose whether your finger draws or scrolls. With a keyboard, a single key switches tools. EDIT ANYTHING Select, move, and resize drawings. Undo, redo, delete one element, or clear the page. CAPTURE AND SHARE Screenshot the visible page or just one area, drawings included. It goes to your clipboard, or to Downloads if you prefer. A DOCK THAT STAYS OUT OF YOUR WAY Place it on any edge in one of three sizes, fixed or free to drag. Keep only the tools you use, pick Sky, Graphite, or Sand, and let it collapse while you draw. REMEMBERS YOUR WORK Drawings are saved per page and come back when you return. Your tools and settings stay as you left them. No account. No cloud. Your drawings stay on your device.

线代解霸，专为考研党与大学生打造的线性代数分步推导计算器。拒绝小数近似，全程精确分数计算，让每一步推导都看得清清楚楚。 核心功能（覆盖考研数学大纲全部考点） 矩阵运算：支持矩阵加减、数乘、乘法、转置、逆矩阵（含[A|I]分步推导）、伴随矩阵、矩阵高次幂、余子式计算，可求解矩阵方程AX=B 行列式：支持任意阶行列式精准计算，可自动生成伴随矩阵 线性方程组：自动判定无解、唯一解、无穷多解三种情况，完整导出通解与基础解系，支持克拉默法则分步求解 特征值与特征向量：可计算特征多项式、特征值、特征向量，支持矩阵可对角化判定，兼容复数与无理数特征值计算场景 二次型：计算顺序主子式，精准判定矩阵正定、负定、不定属性，自动导出二次型标准形 向量空间：判定向量线性相关与无关，提取极大线性无关组，验证向量线性表出关系 基变换：支持过渡矩阵计算、向量坐标变换求解 施密特正交化：完整展示正交化与单位化分步代入推导过程 矩阵分解：支持LU、QR、Cholesky三种主流矩阵分解方式 空间几何：可计算向量叉积、混合积、点到平面距离 矩阵诊断：一键生成矩阵行列式、秩、迹及完整矩阵分类报告 2D线性变换可视化：动画直观演示矩阵拉伸、旋转、剪切变换效果，清晰展示特征向量方向 产品特色 1. 分步推导：完整展示每一步初等行变换过程，方便对照答案、排查解题错误 2. 精准分数：全程采用分数精确计算，无小数近似误差，杜绝0.33333等近似值 3. 一键导出：可将完整推导过程渲染为高清长图，支持本地保存、分享研友 4. 历史记录：自动保存最近20次计算记录，搭配矩阵缩略图，查看便捷 5. 考研真题预设：内置多组经典考研真题示例，一键加载，快速上手练习 6. 自定义矩阵键盘：适配正负号、分数快速输入，支持单元格快捷跳转，操作高效 7. 完全离线：所有计算均在本地设备完成，无需联网，安全高效 适用人群 1. 备考考研数学（数一、数二、数三）的学生 2. 大学线性代数课程在校学习者 3. 需要快速验证矩阵计算结果的科研工作者 技术协议：https://app.notion.com/p/Linear-Master-3b8dbcee63058014b4ececf2b192b874?source=copy_link 用户隐私：https://holy-condor-59c.notion.site/Linear-Maste-3b8dbcee6305809c8557c638fc29a0e0?source=copy_link 隐私政策：https://holy-condor-59c.notion.site/Linear-Master-3b8dbcee63058039b440fe805744a151?source=copy_link