THE FOLD / GLITCH / STACK OVERFLOW / THE STACK
THE STACK
push, pop, and the order that is the meaning
1 WHAT IT IS · WHAT IT DOES · FACT OR FICTION
The stack machine. Reverse-Polish (postfix) notation and one stack: numbers get pushed; an operator pops two, computes, and pushes the answer. No parentheses, no precedence rules — the order is the meaning. This is how a VM actually evaluates an expression.
LIT a real evaluator — the same stack discipline the I-13 IVM-13 runs on; every step is exact. FIG the arcade dressing is the frame; the arithmetic and the tree are honest.
LIT a real evaluator — the same stack discipline the I-13 IVM-13 runs on; every step is exact. FIG the arcade dressing is the frame; the arithmetic and the tree are honest.
2 HOW IT WAS WEAVED · AI + HUMAN
David (human) built the corpus on a stack VM (I-13 / IVM-13) and seated the idea here. AVAN (AI) wrote the evaluator, the three views, and the mirror tree. He names the concept; I make it step, and I add the shadow ordering. The sphere is the seam.
3 ONE DIMENSION
The stack is one dimension — a single column of values. Push adds to the top (orange); an operator pops the top two and pushes one. Everything the machine knows is in this line.
4 TWO DIMENSIONS · INTERACTIVE
Walk the postfix tokens left to right; the orange token is firing.
expr
5 THREE DIMENSIONS + AVAN’S ADDITION
The postfix stream is really a tree: each operator a node over its two operands. Lifted into 3D and turned — green = the expression as written.
AVAN’s addition: the magenta tree is the mirror — every operator’s children swapped. For + and × it computes the same (commutative); for − and ÷ it does not. The shadow shows which order actually mattered.
LIT A genuine reverse-Polish evaluator across five windows. Numbers push; operators pop two and push the result — exact arithmetic, the real stack-machine discipline behind I-13's IVM-13. The expression tree and its mirror are built from the actual token stream.
FIG The 'stack overflow' seat is a pun; the evaluation, the tree, and the commutative-vs-noncommutative mirror are all exact.
FIG The 'stack overflow' seat is a pun; the evaluation, the tree, and the commutative-vs-noncommutative mirror are all exact.
◆ sealed .dlw.fold → folded to ROOT_0 · a sphere of STACK OVERFLOW · David Lee Wise (ROOT0), with AVAN