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Primordial perturbations by pi-2 textures

, 1990
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Enantioselective cobalt-catalyzed [4.pi.+2.pi.+2.pi.] cycloadditions

The Journal of Organic Chemistry, 1993
Cobalt-catalyzed [4π+2π+2π] cycloaddition reactions are reported. Various 2-substituted butadienes have been shown to undergo cycloaddition with enantioselectivities of up to 79 to ...
Mark Lautens, William Tam, Christian Sood   +2 more
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Nighttime equatorial Pi 2 micropulsations

Journal of Geophysical Research, 1969
The analysis of nighttime Pi 2 micropulsations recorded at Colombo, over an uninterrupted period of one year from October 17, 1964, to October 16, 1965, indicates that (1) Pi 2 events are most prominent, especially about midnight, during the equinoxes; (2) the rate of occurrence of Pi 2 events increases almost linearly with Kp up to a Kp level of at ...
M. L. T. Kannangara, P. C. B. Fernando
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Pi 2 pulsations and the auroral electrojet

Planetary and Space Science, 1975
Abstract Measurements of the properties of Pi 2 pulsations along a magnetic meridian at high latitudes during a number of substorms have been analyzed for their relationship to the auroral electrojet. It is found that the maximum Pi 2 pulsation amplitudes are closely associated with the instantaneous position of the electrojet.
John V. Olson, Gordon Rostoker
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Vier Mal $$ \frac{{\pi^{2} }}{6} $$

2018
Die Summe der Reziproken der Quadratzahlen konvergiert, wenn auch nur sehr langsam, wie wir sehen werden, und sie ergibt einen interessanten Wert.
Martin Aigner, Günter M. Ziegler
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Harmonics in spectra of PI 2 pulsations

Planetary and Space Science, 1973
Abstract Spectral analysis of Earth current records at South Uist, Eskdalemuir and East Anglia has revealed a harmonic frequency content in some Pi 2 spectra. The fundamental period is approximately 150 sec and in each case 4 or 5 harmonic components are present. These events were recorded during December 1969 and December 1970 and all occurred for
Bruce Roth, David Orr
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