← The evidence ledger
Evidence row 2201661
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://linear-algebra.x402tookit.com/determinant
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- c30413a08f021aff245fb9423e0415417f04c881eb1d716831f146dc7be09596
- Leaf
- 0x104c923d0b53aea7f6bcf1c3c385d53e476599d8c0d33b9241d1971624365283
What was observed
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"name": "Linear Algebra",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
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{
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{
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{
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],
"description": "Determinant of a square matrix (up to 10x10) by LU with partial pivoting, flagging a numerically singular matrix.",
"extensions": {
"bazaar": {
"info": {
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"queryParams": {
"A": "[[6,1,1],[4,-2,5],[2,8,7]]"
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"output": {
"example": {
"asOf": "2026-10-12T00:51:54.937Z",
"degraded": false,
"determinant": -306,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"exact arithmetic: a determinant near zero is judged against a stated tolerance, not proved zero",
"overflow beyond double range (entries are capped at 1e15)"
],
"reasons": [
"LU decomposition with partial pivoting: the determinant is the product of the pivots times the sign of the row swaps.",
"Smallest pivot is 6."
],
"relativeToHadamardBound": 0.6841,
"singular": false,
"size": 3,
"source": "computed locally",
"summary": "The determinant of the 3x3 matrix is -306.",
"verdict": "DETERMINANT_COMPUTED"
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},
"lastUpdated": "2026-11-01T23:33:56.341Z",
"quality": {
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"serviceName": "Linear Algebra",
"tags": [
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"x402Version": 2
},
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"summary": "Determinant of a square matrix (up to 10x10) by LU with partial pivoting, flagging a numerically singular matrix."
}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).
- 0x104c83fb025897aed0a0b534bbc4c59751d9af1600e8e2475b560c2624b4a94d
- 0x8d37bfc716de161dc66fb75daa2e0c1b7372e19e4e999f8e6031db3d0df25fa0
- 0xe630487e0579d610b9cbfbfe652fe88153c5654ae58d520144fef40534db1e07
- 0xf272f8adc914791ea19fb16f9d04b77e6e9f65861d77b60cfe3f3f8656b9cd61
- 0xd086595b24a6b461f31658ee018689be89b1deb2ffd0e9d73fba8d76f43f9f2a
- 0x26cc1f7b1cf2c2e2eaf6da2c4b2f9d4d7e1a3f43b7067259dd0bed60dd85e5fd
- 0x3ed89c0554a89bcdb3cb2c81586462077dd345ab1494024a76222d084f2c45f5
- 0x468e40116c18b4690ec3b8cea0c6f597393397c6b57fa2e2bec05bdd791a0b55
- 0x10f4f51d77c136c74f0156da856c3a1c5c64e18d0c89c8c53c0517d7f28bd25f
- 0xb2e01a7c5e8234c65832a081aa9b5be19a6e338dcd8c92f1897ae069595bc3e4
- 0x2d4712bd1203bc5244fa0599fa09618cba6739106dab26a3d111b0ec8558f41e
- 0x37c4ce84bc1fbced66397add5bebabce40461398a546a037487c5eeb7879648d
- 0xaed8243a14c659d2324c6748095467bfaec6927f1294091015e04180dda07dd7
- 0x9914dfe331775bd1714304f757d2b6b43ba45167245d645ce50f54a3d8617c4d
- 0xd82979c12a2aae44121bb6058b3364b3a3cbc9be411e35ab0208df5ed56f65d4
- 0x7cb861d18f06406535ade133f716d897f27d257cf0121f99d94c78c713c4b54d
- 0x53a741b69e9e51c4a288a74712aa6ac3fb28c8923cd3e6461d161c4f2d48b31a
- 0x050f2978b537f7afb21ee1551577cdf146d1c56f4df12d24315ae5e69366b0a4
- 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af