semipositive

• semi-positive

semi- +‎ positive

semipositive (not comparable)

1. (mathematics) Having a dual that is nonnegative.
   • 2015, Taro Fujisawa, “A remark on the decomposition theorem for direct images of canonical sheaves tensorized with semipositive vector bundles”, in arXiv‎:

     The purpose of this short note is to give a remark on the decomposition theorem for direct images of canonical sheaves tensorized with Nakano semipositive vector bundles.

2. (mathematics) Having all elements nonnegative where at least one is positive.
3. (materials engineering) A type of compression mold for plastics that allows for excess powder and flash, as in an open flash mold, but which allows for lower melt viscosities as in a fully positive mold.
   • 1981, László Sors, ‎László Bardócz, ‎& István Radnóti, Plastic molds and dies, →ISBN, page 26:

     For such products, a semipositive mold is designed (Fig. 1.1.14), with the flash at a right angle to the direction of pressure.

   • 1996, Philip Mitchell, Tool and Manufacturing Engineers Handbook: Plastic Part Manufacturing, →ISBN:

     The semipositive, vertical-flash type mold, shown in Fig. 13-2, requires double fitting of force to cavity and is costly.

   • 2006, Manas Chanda & ‎Salil K. Roy, Plastics Technology Handbook, →ISBN, page 2-5:

     Semipositive molds are more expensive to manufacture and maintain than the other types, but they are much better from an applications point of view.

4. Alternative form of semi-positive.
   • 1997, Kevin J. O'Connor, ‎Lisa Mages Braverman, ‎& Lisa D. Braverman, Play Therapy Theory and Practice, →ISBN:

     Jason seemed to have two completely different ways of belonging and gaining significance — a negative method with his mother and a semipositive method with his father.

   • 2010, Lois Crozier-Hogle, ‎Darryl Babe Wilson, & ‎Jay Leibold, Surviving in Two Worlds: Contemporary Native American Voices, →ISBN:

     Chief Seathl looked to the future in a semipositive way, saying, "We aren't going to forget who we are. . ."

   • 2004, Gloria Pilar Totoricaguena, Identity, Culture, and Politics in the Basque Diaspora, →ISBN, page 13:

     Basques in Sydney, Melbourne, and North Queensland tend to feel that they have been socially accepted with a semipositive status because of their excellent work reputations with non-Basque employers.