← The evidence ledger
Evidence row 2201590
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://math-geometry.x402tookit.com/quadratic-solve
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 41646d923506a42be47dc397b876000393edb00f5e1592f85c169190db088608
- Leaf
- 0x4725f5f1a50bb55ff71898e5a3ee989efc31227ce6accbebce3cf2018a16fcc6
What was observed
{
"endpoints": [
[
"x402",
"https://math-geometry.x402tookit.com/quadratic-solve"
]
],
"name": "Algebra and Geometry Solvers",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
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{
"amount": "20000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
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"transactionVersions": [
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"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Solve ax^2 + bx + c = 0: real or complex roots, discriminant, vertex, axis of symmetry and factored form.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"a": 1,
"b": -5,
"c": 6
},
"type": "http"
},
"output": {
"example": {
"a": 1,
"asOf": "2026-10-11T08:51:19.381Z",
"axisOfSymmetry": "x = 2.5",
"b": -5,
"c": 6,
"degraded": false,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"discriminant": 1,
"factored": "1(x - 2)(x - 3)",
"notChecked": [
"exact (symbolic) roots: results are decimals",
"roots of huge or tiny coefficients beyond double precision"
],
"opensUpward": true,
"productOfRoots": 6,
"reasons": [
"Computed with the numerically stable form that avoids cancellation when b is large."
],
"rootType": "two distinct real roots",
"roots": [
2,
3
],
"source": "computed locally",
"sumOfRoots": 5,
"summary": "1x^2 + -5x + 6 = 0: x = 2 or 3 (discriminant 1).",
"verdict": "TWO_REAL_ROOTS",
"vertex": {
"x": 2.5,
"y": -0.25
},
"yIntercept": 6
},
"type": "json"
}
},
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},
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"type": "object"
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"type": {
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"axisOfSymmetry": {
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"b": {
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},
"c": {
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},
"degraded": {
"type": [
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"null"
]
},
"disclaimer": {
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"string"
]
},
"discriminant": {
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"null",
"number"
]
},
"factored": {
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"null",
"string"
]
},
"notChecked": {
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"type": [
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},
"opensUpward": {
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},
"productOfRoots": {
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},
"reasons": {
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},
"type": [
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},
"rootType": {
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},
"roots": {
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},
"source": {
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},
"sumOfRoots": {
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"summary": {
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},
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},
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"type": "object"
},
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}
},
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],
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}
},
"required": [
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],
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}
}
},
"lastUpdated": "2026-11-01T23:37:29.505Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T23:37:29.345Z"
},
"resource": "https://math-geometry.x402tookit.com/quadratic-solve",
"serviceName": "Algebra and Geometry Solvers",
"tags": [
"algebra",
"quadratic",
"roots",
"calculator"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Solve ax^2 + bx + c = 0: real or complex roots, discriminant, vertex, axis of symmetry and factored form."
}What the leaf hashes
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Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
- 0x4725f8e4f7b44a0416a23ac08517c69fa0de5b526e7343f96fdf9ea970110311
- 0x3b6b9afd9a1d04c91ad00c637e51eb89d02f8e0bf90675cf02869e05d64a82e4
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- 0x99b483bb15cd4fe0448e626a0bd7c9acf1f7bfb7037f8b33547aa5264830186e
- 0x0724d973836eb289cd1c4aede5dcbe7dbd329fcd0a35962ee14cab398a9d3365
- 0x8f286407488a22f1e3484ec6b19055e8b9c8b3b519ed3d3cf89e82ed98287b36
- 0xd60d9a8c291c3fe05f44ea55a0d880560f09fa25a922591ebbf8d9b0b784a383
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- 0x016b1614282904cb7ef7baaeb01116901a8db7760352f2bde485c913fa2d3143
- 0x698ee6480581964bde446ed654cae2702def127e3ae27ee9be84e44adffdd0ba
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- 0xa3336de478ff1096fe3a4c0522656d3a2923e8e721fe01f8fd137ddc7734c22e
- 0xdc58bc56b35577036d6185abcf0d4c91a45df10bd65f767505c1d43fcecde566
- 0x3217f821997a6d778dcf0814a25b1296c55ab77710c675e7b15695d25a6ce67d
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- 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af