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Garmin GPSMAP 67i with inReach

Garmin GPSMAP 67i with inReach provides rugged GNSS navigation, satellite messaging, and SOS for backcountry geology and climate field teams.

Chern numbers of algebraic varieties

Dieter Kotschick solved Hirzebruch's problem, determining that most Chern numbers depend on algebraic structure of a variety, not topological properties. The breakthrough resolves the relationship between flexible and rigid geometric objects.

Mathematician's insight helps unravel knotty problem

Shelly Harvey's discovery applies to a longstanding problem within knot theory, but its significance lies in the broader context of topology. The underlying structure she uncovered uses algebraic structures to describe similarities and differences between knotted shapes, offering a new approach to proving equivalency.