is a prerequisite of Arithmetic
some notes here
Algebra
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SubtractionMultiplicationQuadratic Equations Arithmetic SequencesFactorizingProof by InductionPrime Numbershello
This is a graph editor. It lets you place nodes, edges and notes on the canvas manually and add custom attributes to each node and edge for a clean JSON export. Switch to the Editor mode using the menu. Select the node or the edge to modify its properties You can also use right-click menu and keyboard shortcuts: ・Tab to create a target node ・Shift+Tab to create a source node ・~ to create a child node ・Ctrl+~ to create a parent ・Backspace or Delete to delete the currently selected node/edge/note

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Sample graph

Compound graphs allow nodes to be nested inside each other.


The editor app Grapher v250630 is a tool to visually create compound graphs and was created by @nileshtrivedi.

The Foresight Institute is using it for their civilizational (Nanotech, Neurotech, Longevity, SpaceTech and Intelligent Cooperation) tech trees.

The code for this tool is available as open-source. Bug reports and PRs can be submitted there.

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