Pith Number

pith:QMEVTYD6

pith:2015:QMEVTYD6LOOKT5CEQECUPOXRTM

not attested not anchored not stored refs pending

Nonexistence of Almost Complex Structures on the product $S^{2m} \times M$

Ajay Singh Thakur, Prateep Chakraborty

arxiv:1508.06458 v1 · 2015-08-26 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QMEVTYD6LOOKT5CEQECUPOXRTM}

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	2026-05-18T01:19:00.337950Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

830959e07e5b9ca9f444810547baf19b2c58542e337a6eb4599f6bd7ec26a4f7

Aliases

arxiv: 1508.06458 · arxiv_version: 1508.06458v1 · doi: 10.48550/arxiv.1508.06458 · pith_short_12: QMEVTYD6LOOK · pith_short_16: QMEVTYD6LOOKT5CE · pith_short_8: QMEVTYD6

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/QMEVTYD6LOOKT5CEQECUPOXRTM \
  | 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: 830959e07e5b9ca9f444810547baf19b2c58542e337a6eb4599f6bd7ec26a4f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5ee589508547da83a0f126a40c2961a2c51e52f9a139b827cc869930de2bf7a0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2015-08-26T12:07:08Z",
    "title_canon_sha256": "b1f7a992000166feca4339d761d501c4e0b1ebd446e648f13cba1a4c771236d3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.06458",
    "kind": "arxiv",
    "version": 1
  }
}