An ordinary Petri net is a bipartite directed graph composedof places, drawn as circles, and transitions, drawn as bars. A formal denitionfollows [3]:Denition 2.1 An ordinary Petri Net (PN) is a 5-tuplePN = (P;T;I ;I + ;M 0) where:1. P = fp 1 ;p 2 ;:::;p n gis a nite and non-empty set of places,2.
The Colors of Geraniums. Geraniums come in a host of colors, from the traditional white, red and pink to the more exotic orange and purple. Geraniums (Pelargonium spp.) are popular garden favorites that can be cultivated throughout all the USDA hardiness zones as annuals or year-round as indoor plants.
1 As a constituent in a blended cream or lotion, rose geranium essential oil can be used for clearing sluggish and oily skin, as well as wound, burn and ulcer healing and has value to treat eczema, repelling insects, shingles, cellulite, ringworm, bruises and engorgement of the breasts. Rose geranium oil can be used in blended massage oil, or diluted in a bath to assist with PMS, depression, stress, anxiety and tension, fluid retention, edema, eczema, shingles, cellulite, bruises, ringworm, hemorrhoids and menstrual irregularities.