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Sum of Squares Decompositions and Rank Bounds for Biquadratic Forms.

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Title: Sum of Squares Decompositions and Rank Bounds for Biquadratic Forms.
Authors: Qi, Liqun1 (AUTHOR), Cui, Chunfeng2 (AUTHOR) chunfengcui@buaa.edu.cn, Xu, Yi3,4,5 (AUTHOR)
Source: Mathematics (2227-7390). Feb2026, Vol. 14 Issue 4, p635. 16p.
Database: Academic Search Ultimate
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An: 192049231
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PubType: Academic Journal
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  Data: Sum of Squares Decompositions and Rank Bounds for Biquadratic Forms.
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  Data: <searchLink fieldCode="JN" term="%22Mathematics+%282227-7390%29%22">Mathematics (2227-7390)</searchLink>. Feb2026, Vol. 14 Issue 4, p635. 16p.
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=192049231
RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.3390/math14040635
    Languages:
      – Code: eng
        Text: English
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        PageCount: 16
        StartPage: 635
    Titles:
      – TitleFull: Sum of Squares Decompositions and Rank Bounds for Biquadratic Forms.
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            NameFull: Qi, Liqun
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            NameFull: Cui, Chunfeng
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            NameFull: Xu, Yi
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              Text: Feb2026
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              Y: 2026
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