Pith Number

pith:ZQRATRYN

pith:2017:ZQRATRYNMBTDBBWBT5WQGNEIMS

not attested not anchored not stored refs pending

A Geometric Description of Feasible Singular Values in the Tensor Train Format

Sebastian Kr\"amer

arxiv:1701.08437 v2 · 2017-01-29 · math.NA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZQRATRYNMBTDBBWBT5WQGNEIMS}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-17T23:49:06.386048Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc2209c70d60663086c19f6d03348864b1591ac22edbd8fd7b8dbee301b5ce67

Aliases

arxiv: 1701.08437 · arxiv_version: 1701.08437v2 · doi: 10.48550/arxiv.1701.08437 · pith_short_12: ZQRATRYNMBTD · pith_short_16: ZQRATRYNMBTDBBWB · pith_short_8: ZQRATRYN

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/ZQRATRYNMBTDBBWBT5WQGNEIMS \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: cc2209c70d60663086c19f6d03348864b1591ac22edbd8fd7b8dbee301b5ce67

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "276fda0f4687a75dab241495d41d87c13c9f98a4229cc3004017dadcc9aca242",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-01-29T21:50:20Z",
    "title_canon_sha256": "f580e4da4cba3dcc081256c150848b6edb0f9c3cb4e7f00b87a4dacbf2c9ac28"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.08437",
    "kind": "arxiv",
    "version": 2
  }
}